GMC Sierra 2500HD Questions Maintenance & Repair

2003 GMC SIERRA 2500 Passenger Windows Not Working

The passenger side windows stopped working. Rear passenger window is part way down. Checked all fuses and seem good unless I missed one. The 25 amp circuit breaker located under the dash gets hot. ...

How Do I Bypass Fuel Sercuity System

How do I bypass fuel sercuity system on 2000GMCseirra2500 4x4 SL

Why My Truck Won't Move

I drove into my driveway and then I went to back up and nothing it wouldn't go forward or reverse

Oil Pressure Does Not Read PSI

I just replaced my oil pressure sensor but my oil gauge is still not registering PSI

Will Shift But Feels Like It Is Stuck In Park

2007 Chevy 2500 HD can shift into reverse or drive but is stuck in park. You can feel and hear the transmission shift but will not move.

Need Help Fixing This I’m Not Good At The Wiring Part

Keep getting codes p0117 and p1082. Temperature gauge goes all over I’ve replaced the sensor Reset codes Disconnected batteries Idk Any help would be awesome

Engine Cranks Wont Start.

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...

Transmission Shifting Hard

(First Owner) I have GMC Sierra 2006 2500hd 6.0L 4 speed automatic transmission with mileage 290000km. When I start the engine everything work fine until I cross 120 km/h the problem start here, t...

2500 Hd Transmission Flush?

no issues with trans should it be flushed during filter and fluid change? GMC 2500HD 2003 crew cab over 200,000 miles.

New Fuel Pump But Still Will Not Come On And Start

Truck with stall and then sometimes start right back up sometimes have to crank several times before it started. Replacedfuel pump and fuel filter still crank but no start.

4L80E Is Always In Drive

4L80e has no reverse. Will drive in park, neutral, drive, 3, 2 and 1

Truck Not Starting Consistently Why?

2001 gmc HD 6.6 Have had no issues prior to this, I have 173 000 on this truck. 92 degree day. Drove to dump today, turned off, emptied trash, finished and started it back up then drove to the gas...

Need To Know If Rim's Will Fit My 98 Sierra 2500 Hd Pickup

Will 265 R/70 18 HD rims go onto my 3qt ton HD 4×4 GMC Sierra pickup

Engine Hissing Noise

Hello, I have a 01 GMC Sierra 2500 with the 8.1 liter V8. Did some driving in 90 degree weather, After shutting the engine off I heard a hissing sound coming from the engine for a few seconds afte...

Can I Bend An Aluminum AC Pipe With A Pipe Bender Without It Cracking?

I am installing a Dual 220 Amp Alternaror to my 2015 GMC HD2500 Denali (6.6 ltr Duramax). This bolts to the side of the AC Compressor. An Aluminum pipe coming from the top of the AC Compressor appears...

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...

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...

GMC 6.0 Liter. Where Would The Oil Come From?

While driving my 2007 GMC Sierra 2500 hd with 6.0 liter I got a low oil pressure shut off engine warning. Sure enough all of the oil had blown out somewhere on the drivers side of the engine. I hav...

Is It My Transmission Or Other?

My 2001 GMC Sierra 2500HD has the 4L80E transmission and it is stuck jn a gear not sure which one but it doesn't have reverse or neutral either and when j put it in Park it still wants to go forwar...