Edmunds Answers questions

I have a 97 gmc 1500 4.3 that has a miss. Any suggestions? I have replaced all the usual suspects!

gmcgirl1 — Sat, 02 Feb 2008 13:14:47 GMT

It doesn't do it all the time. Only on cold wet days. I have checked all the wires, replaced plugs rotor cap fuel filter. Any good ideas before I take it to the dealer?

1995 GMC SIERRA1500 PICKUP AUTO TRANSMISSION WON'T REVERSE. WHAT'S WRONG?

999ml — Sat, 19 Jan 2008 19:41:52 GMT

THE TRUCK IS AUTOMATIC AND SHIFTS AND DRIVES GOOD, WHEN IN ANY OF THE DRIVE GEARS. WHEN PUT INTO REVERSE, IT WON'T MOVE AT ALL.

Differential leak one month after service. GMC Sierra 1500.

nickmasloski — Mon, 04 May 2009 20:36:54 GMT

2005 Sierra 1500 with 54000 miles. Taken into GMC dealer service shop about two months ago for the differential fluid drain and replace service.

Last week I noticed oil leaking from somewhere. I couldn't pinpoint the leak so during oil change the same service techs said it was the differential pinion seal.

I estimate the leak to be about 3 to 4 weeks old by the amount of oil under truck and in driveway and street. Is this something possibly caused by the service tech by over filling or not possible?

I have a 1998 GMC Sierra 1500 with a cassette deck. I would like to change it. Is there a dash to accommodate?

richmen — Tue, 20 Oct 2009 23:00:58 GMT

It would be nice to take out the cassette and replace it with a CD/DVD/USB.

Oil weight for Silverado

rreid2 — Fri, 01 Feb 2008 20:16:47 GMT

1. Even though it calls for 5W30 GM dealerships are using 10W30, is it because of the climate. We live in west texas. I have 10W30 in all my vehicles because I heard of a recall on the Castrol GTX 5W30 oil. And I prefer Castrol GTX. I called GM and they know nothing of the recall. And now I'm in the process of changing out all the vehicles to 5W30 again. Since you answered my question.

I'm confused about weights of oil, what is the difference between 5W30 and 10W30?

rreid2 — Fri, 01 Feb 2008 21:14:14 GMT

I had a 99 Silverado with a 6liter and put 10W30 in it according to the temperatures in the owners manual. Wouldn't it be the same on my 2007 8.1liter GMC Sierra? My 6liter had 190,000 miles on it and never burned oil.

does 07 silverado classic 2w/d come with coil over frt suspension

blade4 — Mon, 07 Jan 2008 20:49:52 GMT

I have 07 silverado classic x/cab 1/2 ton what frt suspension was used on these trks ? coil over?

New starter, new battery, now what? Chevy Silverado won't start.

clay99 — Thu, 10 Sep 2009 20:44:18 GMT

My 98 Chevy Silverado 100,000 miles suddenly didn't start. It clicked once every time we turn the key. We put a new battery in and a new starter. The starter checked out ok at the shop. We cleaned the battery terminals ran a wire from positive down to the starter no luck. What is going on?

2007 GMC Sierra 8.1L which oil to use 10W 30 or 5W 30, need to know.

rreid2 — Thu, 31 Jan 2008 20:40:04 GMT

Also want to know at what mileage point should I change over to synthetic oil?

Can you help me set up trailer brakes for towing with my Chevy truck?

cardoc12 — Thu, 27 Dec 2007 21:12:53 GMT

I have a 2003 Chevy 1/2 T Ext Cab. Do you know if it has a pig tail for the trailer brake or if it has a plug for a pig tail?

2000 Silverado/5.3 V8 to start it the key has to be turned on for 2 or 3 sec. Replaced the fuel pump ???

jd723 — Sun, 24 Feb 2008 05:46:18 GMT

The check engine light is on, and when it is scanned the only thing it comes up with is the gas cap is loose. It was replaced too. I replaced the fuel pump thinking it was not holding the pressure after the motor is shut off...or not building the pressure fast enough when the key is turned on.
But if I hesitate (2 or 3 seconds), before turning the key to start, the motor fires right up. Oh yea, the fuel filter has been replaced...before the pump was. I've tried high octane gas from major oil companies...no change. I've had this truck for over 1 1/2 years, and its been like this all along. I'm used to starting it like this, but I'm tired of it. Any help will be great, and Thank You

Can a 07 Chevy Silverado Classic front bumper be swapped with 07 GMC?

dsonz71 — Fri, 20 Jun 2008 16:08:50 GMT

I like the air dam/fog light configuration better on the GMC

I have a 2004 Chevy Classic. If I turn sharply to the left and apply the brakes I get a growling noise.

biged1942 — Thu, 09 Oct 2008 11:35:17 GMT

I have a 2004 Chevy classic. When I turn sharply to the left and apply the brakes there is a growling noise on the left front. It does not happen if I turn left.

How do I stop inside tire wear on an 07 Chevy Silverado Classic?

skirider70 — Tue, 28 Oct 2008 07:10:53 GMT

The drivers side tire is wearing about twice as fast as the passenger side. It is just the inside shoulder of each tire. I just put new bridgestone tires on it 6 months ago and I have had it alligned twice since then. Over half the tread is gone where it is wearing. The shop said they cheked out the suspension parts and could not find anything wrong and just told me to keep an eye on it. The tires are still wearing in the same place.

Where is the oil filter located on a for a 2005 Chevy Classic?

loveme1 — Fri, 19 Dec 2008 15:15:58 GMT

I would like to see a picture of where the oil filter is located for a 2005 chevy classic?

I have '01 Chevy Silverado v6 and it has low vibration coming from below the truck at 1200rpm only. Any ideas?

twochevies — Wed, 24 Dec 2008 12:06:54 GMT

i bought it with 90000 miles and it was owned by a gm mechanic before me(im the second owner) and the dealer and a seperate mechanic convinced me it wasnt the tranny. someone else that looked at it told me it was coming from the catalytic converter but that didnt make sense to me because i cant get the vibration if i rev the motor in park. i only notice it when im cruising @41-43mph and when i start it up and put it in drive and very slowly accelerate. I take very good care of my cars and the truck now has 127,000 miles on it. Ive had it for two years and i guess it hasnt caused any other problrms its just annoying

Do these tires fit my 2007 Chevrolet Silverado 1500 Classic, 2WD crew cab with 20" rims? 265/50/R20.

lcedillo — Thu, 12 Nov 2009 15:40:09 GMT

Do these tires fit my 2007 Chevrolet Silverado 1500 Classic, 2WD crew cab with 20" rims? 265/50/R20.

Offroad my Sierra in sand?

hurkyjerky — Thu, 27 Dec 2007 16:56:58 GMT

I was wondering what the 2004 GMC Sierra Denali had for a drive train. Is it fulltime 4x4 or is it traction assist? Can it be used for off road in soft sand?

94 GMC Sierra following an accident,rollover,there is no power, the battery is charged. Is there a reset switch an

chris120 — Fri, 04 Jan 2008 11:16:19 GMT

My 94 GMC Sierra was in a roll over accident and ended up on it’s top. At that point the headlights were on. It is now up-right but there is no power, the battery is charged. Is there a reset switch and where is it located?

I unplugged/reconnected my tlr from my 2007 GMC Sierra and now the tlr lights won't don't work. What happened?

norm21 — Thu, 24 Jan 2008 21:38:24 GMT

Vehicle lights were on at the time. Would that have anything to do with the trailers lights not working now? I looked at the fuses and did not find any blown ones.

2003 Sierra Stalls when stopped

schooner62 — Thu, 24 Jan 2008 22:41:48 GMT

2003 GMC Sierra V8 4wd SLT Automatic 144000 km My truck will stall for no reason. It has done this twice at a stop light. The display read "battery not charging", but I had lots of power to turn it over. It started up again, I got to drive it for about 100 feet, then it stalled again. It did this 3 times before I could not get it to move again. It would just start and stall. There is plenty of gas going through the fuel injectors and plenty of power in the battery. It took me about 20 minutes before I killed the battery. I just replaced the alternator on it about 1 month ago as it did the same thing then. After the alternator was replaced it ran fine for a month then started again. The garage I had it towed to cannot find the problem as the truck is now running again, he used the scanner and it came up different codes each time. I had driven the truck about 20 minutes each day that it has happened. Any suggestions on what could be causing this. It has happened twice in cold weather also. I have had this truck since May 07 and never had a problem with it till now.

97 gmc sierra 5.7 12 mpg new wires, plugs, fuel pump, k&n, O2 sensors, why the bad mileage? any ideas

metzger1 — Wed, 30 Jan 2008 02:47:45 GMT

I replaced the fuel pump, plug wires, plugs (bosch platinum 2's), added a K&N cold air intake, replaced oxygen sensors (all 4 with bosch), tornado in the intake tube. I did all this stuff and went from 10 mpg to 12. i dont understand what the problem is. i heard the factory throttle bodies are junk, and that i should get a 2 barrel tbi. im not sure if a tbi spacer will help me much, since i have a tornado which swirls the air already. my service engine light turns on when i drive the highways, the code is a tranny slip code. im possitive that if it is slipping it definately isnt much. when i power break it, it bogs the motor down pretty good, until the tires slip. although when im on the highway doing about 68 mph, im at 1800 rpm. my truck seems like it is just running too rich at low rpm. it hesitates from idle to rev. thanks for reading, please help.. thanks

can i swap a 4l60E tranny with a 700r4 or a 4l80E

metzger1 — Wed, 30 Jan 2008 20:39:01 GMT

would this swap be worth it for my 97 gmc sierra 5.7. which tranny is better than the rest that wouldnt be too difficult to swap so i can get away from the 4l60E? thanks

RFA 3 BATTERY LOW, 2003 gmc sierra 1500 5.3l.

empete2000 — Wed, 30 Jan 2008 21:03:23 GMT

I'm getting the message, "RFA 3 BATTERY LOW", in the message center on a 2003 gmc sierra 1500 sle 4x4. Anyone know what this is? I ran OBD-II diagnostics but it did not come up with anything.

EP

97 gmc sierra

metzger1 — Thu, 31 Jan 2008 02:21:40 GMT

the problem im having with it, is that it is that the 4l60E is a piece of junk tranny. i have a tranny slip code coming up, only when i drive it on the highway, i heard that the 3rd clutch is burnt up, by another member on here. everybody i talk to say that tranny along with the 700r are junk too. what is your opinion? is the 4l80E better, and why. maybe if i put a mild shift kit in my 4L60E when i get it rebuilt that would be better. im gettin like 12 mpg on the highway runnin about 1800 rpm doin 65. maybe i just dont understand that with a 5.7 thats all the better im gonna get. but there has to be a way to get at least 16-17, maybe i have to gear it differently thanks alot for your response

matt

does anyone know how you change a light on the buttons on the steering wheel in the steering

smcbob — Sat, 02 Feb 2008 14:18:33 GMT

the light in one of the buttons on the steering wheel is out .does anyone know how that button pod is removed?

my 03 sierra stalls before its warmed up, what was the cause of your stalling and how did you fix it?

streetbob26 — Fri, 08 Feb 2008 23:36:49 GMT

Thanks any input would b appreciated.

I have 2000 GMC Sierra SLT Z71 with a 5.3 that is idling at about 400 rpm in drive,anyone know whats up with this thing?

wcallahan — Tue, 04 Mar 2008 13:21:01 GMT

my 2000 GMC sierra slt z71 has began idling too slow sitting at red lights,when I take off it sort of bogs for a minute, it's idling at about 400-450 rpm,how does the 5.3 control its idle, has anyone had this problem and what did you do to correct it, please?

On a 2003 GMC Sierra 4x4 with towing package. Does anyone know where the harness for hooking up electric brakes is?

ctc3 — Fri, 21 Mar 2008 19:32:16 GMT

I am trying to hook up a reese electric brake controller. does anyone know where to locate the factory harness for the trailer?

Bad vibrations in 1999 GMC Sierra Z71 four wheel drive? Front drive shaft turns all the time. Any clues dudes.

cinvest — Fri, 28 Mar 2008 11:05:43 GMT

Four wheel drive won't turn on either. Probably a bad module. But the biggest headache is the vibes between 45 and up. Thanks.

Vibration 4 wheel drive 1999 GMC Z71

cinvest — Fri, 28 Mar 2008 16:31:28 GMT

Thanks Mr. Shiftright for a reply. I'm still following this problem of vibration. Is the front wheel drive shaft supposed to spin when moving and not in 4 WD? One of the u joints was stuck and replaced but still getting the vibrato from 35 mph to 70 and up.
Mucho Gracious.

I own an 06 GMC Sierra Duramax. I get 21 MPG at 72 MPH and 15 MPG AT 75 MPH. Is this normal?

iamsziam — Sat, 29 Mar 2008 21:25:16 GMT

I tow an equipment trailer about 7000 lb. and get 13 MPG at 70 MPH. I'm considering buying a performance enhancer just to get more MPG. Any suggestions on brand and model?

I just went over 100k in my 2002 5.3L GMC Sierra 2wd, what all should I do to tune it up?

jacoblebowski — Tue, 01 Apr 2008 16:03:31 GMT

2002 Sierra 1500 2wd, Ex. Cab
5.3L Engine
100k miles

03 GMC Sierra 4x4, clunking, vibration in steering when turning at slow speeds on bumpy roads. Only 60,000 miles.

carbuff1954 — Fri, 11 Apr 2008 00:31:01 GMT

My 03 GMC Sierra 4x4 at 60,000 miles makes a clunking noise in steering/front end at slow speeds on bumpy roads, especially when turning. Ball joints, shocks, etc. seem to be in good shape. Others have suggested intermediate steering shaft could be the problem? Suggested lubing U-joints in shaft? How do you do this with no grease fittings?

What size speakers came in a 2002 GMC Sierra extended cab pickup? Front and rear factory sizes, or what sizes to buy?

cleslie2006 — Wed, 23 Apr 2008 16:19:18 GMT

I'm thinking about changing out my factory speakers and I do not know the sizes of the front 4 and the 2 rear. I also have an amp I want installed and maybe a subwoofer too. Can you please email me the sizes of all the speakers that came in a 2002 GMC sierra extended cab p/u. It's a sports side if that matters (step side) it is all power, 9 way power seats, heated seats, leather interior including seats, on-star, bucket seats with fold down arms. If you have any questions, please email me as it is the best way of contact. Thank you, Carl

GMC Sierra 1500 5.3l misfires

greg1988 — Thu, 01 May 2008 00:42:19 GMT

i have changed the fuel pump(multiple times) fuel pressure regulator,fuel filter,mass air flow sensor,mat sensor. but truck still misfires,back fires, and spits and sputters. throws code p300-random multiple misfire. done a bunch of vacuum tests the intake is not leaking and i recently had my injectors flushed. I am about to light it on fire.

02 GMC Sierra 5.3l starts, runs for a minute, then stalls.

savagulyk — Thu, 01 May 2008 10:10:28 GMT

Seems like it runs out of fuel. You can hear the fuel pump come on and it gets fuel to engine not sure what the psi is but there is fuel. when you first start it idles, soon as you put your foot on the pedel it bogs down, release it and it idles for awhile then stalls and won't start. Wait awhile and it starts again. Has new fuel filter on frame rail and check for codes no codes. please help thanks
Leon

2002 GMC Sierra idle air control

savagulyk — Thu, 01 May 2008 11:33:11 GMT

where is this located and what methods to clean. When we add fuel to intake it well stay running do you the think this is still the idle control? Thanks for the info
Leon

2002 GMC Sierra 5.3l fuel pressure

savagulyk — Thu, 01 May 2008 14:50:49 GMT

What should the fuel pressure be at the test port. I get 24psi with key on and guage is up and down on startup. Runs for awhile then stalls guage reads 5-15psi. could this problem be the regulator or fuel pump

I found metal shavings on the bolt to my oil pan on my GMC Sierra 1500. What does that mean? My truck has 190k miles.

kingtee — Tue, 06 May 2008 15:31:12 GMT

My truck is 1997 GMC sierra1500 Reg. cab.

2004 GMC Sierra Denali. The driver's side power seat quit working. Fuses, breakers and relays fine. Anyone help?

srichburg — Mon, 12 May 2008 21:36:35 GMT

Worked fine, then wife tried to put seat forward, and no luck. Heated seats are out too. Fuses and relays and the breaker under the dash are all ok but replaced. Seat still inoperable. Any help appreciated.

1998 GMC Sierra 1500 4x4 81000 miles. Oil laking from front transfer case seal. Degree of difficulty for a DIYer?

atompopper — Sat, 24 May 2008 12:36:41 GMT

1998 GMC Sierra 1500 4x4 81000 miles. Oil leaking from front transfer case seal. Degree of difficulty for a DIY repair? Do I need a manual or is it as obvious as it looks?

Can I install factory keyless entry on my GMC Sierra 1500?

jreide — Wed, 04 Jun 2008 15:58:37 GMT

The truck is a 2008 Sierra 1500 WT. The truck has electruc locks. Here is what I can find in print. If the truck is equiped with RPO code AU3 (power door locks) then it will have keyless entry and come with 2 FOBs, but if another option 5B5 (power lock, power windows and power mirrors then the keyless entry becomes an option AU0. Okay I can't really say that all of that makes any sense but all the same thats what I am able to find out so far. I quess my real question....is the wiring for the receiver for the keyless entry installed. If so it seems that one could buy the receiver and the FOBs install same and factory keyless entry. It is my understanding that the receiver or wiring for it will be in the rear overhead above the back glass. Thanks for any and all help.

J

06-Sierra 1500 GMC. Camshaft and lifter problems. Caused metal to into engine. GMC basically said "Sorry."

unhappy21 — Tue, 10 Jun 2008 16:26:43 GMT

We want to know if anyone else has had camshaft lifter promblems with GMC Sierra 1500? It sent metal into the engine so we have to get a new engine. GMC knows of this problem but its just telling the dealerships to take note of the problems. No recall as of yet? If we fix the problem and then they recall it will we get reimbursed?

Random misfire 2002 GMC Sierra 1500

seeds — Mon, 23 Jun 2008 14:07:16 GMT

changed plugs,wires,intake gaskets,cat converter drivers side,injector balance test,running compression test,and changed #4 injector because it ohmed a little high.still the engine light flashes under hard accelleration and sometimes gives code p300,was misfireing mostly on #3&4 but now on 4&5. also fuel pressure test@idle 50psi @3500rpm 48psi.I AM LOST

I have a 2008 GMC Sierra and when I try to fill up with gas the pump shuts off after five seconds.

montanafarnum — Fri, 11 Jul 2008 16:58:27 GMT

the hoses from the gas cap to the tank do not appear kinked or obstructed in any way. I can refill the gas tank only if the pump is going as slow as it possibly can

How do I remove the fan from the water pump on a 2002 GMC Sierra?

kslovak_2000 — Tue, 12 Aug 2008 18:58:10 GMT

Trying to replace the water pump on a 2002 GMC Sierra , and the fan is giving me a bad head ache...anyone ever removed one of these dudes?

2000 GMC 1500 5.3. 100k. Light rapping noise in motor. Good oil pressure. Possible valve train?

ss90 — Tue, 12 Aug 2008 22:59:20 GMT

motor run nice noise mainly on idle sounds to be in the middle of motor

1994 GMC Sierra stalling out

pardeepsoora — Fri, 22 Aug 2008 17:59:29 GMT

I have 1994 gmc sierra 4.3l when i accelerate the truck starts to stall out as if something was choking it, i can get it to go fast enough to go into second gear with out it stalling, fuel pump, fuel filter, fuel line, plug n wires, have all been replaced, egr valve has been cleaned. Any ideas of whats wrong??

I have a 1996 GMC 1500 v8 5.7L. Doesn't want to start without putting gas into the carburetor.

lfish78 — Thu, 04 Sep 2008 13:12:46 GMT

I have replaced the spark plugs,wires & rooter and before I replace the intake gasket I would like to see if anyone would know what was wrong? It has a vacuum leak somewhere and idles high witch makes me have to put a lot of gas into it. Every time I start it if it sets over in hour I have to put gas in the carburetor for it to start but it starts like that every time.