GMC Questions Maintenance & Repair

Neither Brake Light Is Working

Both brake lights are out. Got all other lights. Need list of possibilities of problems & where to find & fix them

Why Do I Still Have A Speed Sensor Problem?

Odb2 said I have a speed sensor circuit malfunction put a new sensor in and changed pigtail it was butt connected when I got the truck now it is soldered with new pig tail, no apperent shorts or b...

Passsenger Lighter Dead: 2019 GMC Savana

Drivers side lighter works, but passenger side lighter is dead. Only one fuse that I can identify in the fuze block and it's good. Is there an inline fuze servicing the passenger side, or how do I f...

Where Is The Fuse For The Fuel Pump

Truck Doesnt Want To Shift

Truck shift up to 2nd no problem but wont shift to 3rd unless your rpms are really high and wont shift past that

My 04 Yukon Xl Will Turn Over But Want Start

I'm trying to figure why my 04 yukon want start. I replaced the alternator and crank shaft position sensor. Why want it start? Have it jumped timing?

Why My 2007 GMC Won't Crank ?

Changed batteries on my 2007 GMC Yukon .now I have no power , won't crank won't start , . Battery is good , ground cable is good . What could be wrong ?

Why Won't My Truck Start?

turn the key and nothing (no clicking or anything). Battery is pretty new and all wiring seems to be secure

Transmission Control Module Replacement

I am trying to replace my Transmission Control Module Replacement on my gmc 2003 yukon. Where is it located?? And also will this help with my truck not going into gear. It does when i start it but...

Injectors Won’t Spray

I stuck the battery in backwards like a moron and now the injectors won’t spray I put a new computer in it and a relay and a pump and a filter and there is fuel pressure up to the throttle body bu...

GMC Terrain Wont Start After Headlight Changed

Headlight went out in my GMC terrain. Changed it and light came on but car just clicked like batter was dead and dash lights flashed. Will start when I jump it

My 2005 Envoy Denali Shifter Just Came Out.

It can be put back into it's socket and used, but it just lifts out if i'm not careful. I can't see what is going on because of the cover over the console where the shifter goes in. Is there an an art...

Stalls How To Fix This ?

There is a lot of questions but not much for answers 1997 Gmc , idles fine /like new / touch the gas and it stumbles and stalls? Repairs done inc a new fuel pump , up stream O2 sensor, switched ou...

1990 GMC Sierra Won’t Move When In Drive Or Reverse

Truck has been fine until the temps dropped from 60 degrees nightly to 37-39 degrees nightly which happened from one night to the next in one 24hr. timespan. Next thing I know, I wake up and it’s t...

How To Turn Off 2002 Sierra Security Light?

I have 2002 Sierra chassis, drive train, instrument cluster,and electrical system in 1955 Chevy truck sheet medal. Have delt with all codes and issues except security light and airbag light. Any hel...

If It’s Able To Put A 6.0 V8 Ss Engine On A Gmc Yukon 1994 K1500

I have a Yukon 1994 and I was trying to find out if I can put a Model: 2009 Chevrolet Trailblazer Horsepower: 390 hp Engine: 6.0 L V8 MPG: 12 city / 16 highway If I was able to switch out the 350 sm...

2006 GMC Sierra 2500HD Duramax Allison 6.6

I’m buying this 2006 GMC Sierra 2500HD Duramax Allison 6.6 Diesel Engine and I want to know if i need to add any specific type of flex fuel or dex fuel to the engine? I’m not to familiar with Diese...

Engine Not Starting / And Other Weird Symptoms

Hi there, the truck in question hadn't been started in two or three weeks because we haven't gone anywhere. Here's what happened when I tried to start it two days ago. 1) It sounded like the engine...

I Have A 4l60e Transmission That Wont Shift Into 3rd Gear.

Ive checked the fluid and its completely full

I Have A Problem With My Truck, I Need Your Advice. Can You Help Me?

I have a 2003 gmc Sierra 4.8L Ext. Cab 4x4 high mileage. It runs great when you started up and drive it. Once you turn it off for a while. It starts up fine, but when you try and drive it, it skip...