GMC Questions Maintenance & Repair

Volumetric Efficiency Beta

What is it my volumetric efficiency suppose to be at

My Truck Stopped Cranking Any Ideas Why

my truck just all the sudden quit cranking I've hit new fuses mess with relays ran into ground wire new battery and then it would start ran fine then one day I quit drinking again and it hasn't I...

Loss Of Compression

my engine is reporting loss on left side of engine

Rebuilding Transmission For '90 GMC K2500 Sierra 5.7/350 4WD

My transmission went out and I'm on a pretty strict budget. I'd like to rebuilt my own transmission but can't really find any reliable information online (so far). My truck has been reliable and mai...

Battery Charge

I have a 2004 yukon change my battery n altornater n when i drive its says not charging but then it goes back up any suggestions.

Engine Light On

after fueling car won't start correctly, have to shut off and then it starts. blows white smoke, new engine replace last year

Overheating

We are at a loss with my Yukon! We have replaced water pump, thermostat, radiator, coolant temp sensor. There are no leaks in hoses. The oil is not milky, so we don’t think it’s a head (besides the...

I Have An 2003 Yukon Denali When I Plug The Back Of My Factory Wiring In My...

I have a 2003 Yukon Denali and when I plug The wiring harness into the stereo my gauges won’t work only one window will go up and down the battery light comes on the ABS and I think one more but I...

99 Gmc Suburnan No Turn Signal Or Brake Light On Driver Side

I have a 1999 gmc suburban... the driverside rear turn signal and brake light does not work.... Passenger side works fine. Have replaced the entire tail light assembly, all wires to the assembly, r...

1988 GMC Sierra K1500 SLX Transmission Return Line Leak

I got this truck that's been leaking transmission fluid from the lowest transmission line on the radiator. It has a brass fitting, a brass transfer piece, and another brass fitting connecting the ...

I Have No Rear Tail Lights In My 03 Envoy Slt. Fuse Keeps Blowing

So I have rear break lights, reverse lights, blinkers, and head lights, but no rear running lights. There is power at the fuse box and the circut board is good. It calls for a 10a fuse, and it blows...

98 K1500 Brake Light Problem

I changed the brake booster out on my truck a few days ago and the brake work well now but brake lights are non existent. I found a Chinese looking wire harness hanging under my dash after I got th...

TRANSMISSION

2000 GMC 2500 TRANSMISSION IS SLIPPING OUT OF OVERDRIVE .WHAT CAN I DO TO STOP IT

Driver Door Electrical Failure

My passenger windows started going down on their own, and I can't put them up with my driver door switches. Nothing works. Everything electric from my driver door will not work! Help

Transmission Shifting Out Of 1st Gear

Just replaced new GM transmission last summer. Has 3 year warranty. Maybe once every 3 or 5 months from a stop I accelerate and it stays in 1st gear (3k) on tach. I let off pedal and it engages i...

1994 GMC Sierra Crank But No Start

My 1994 GMC Sierra 1500, 5.7L, stopped working going Up the mountain... heard a pop sound from under the hood. Lost all engine power cranked no start. Battery is good, terminals are new, ground ar...

Rpm Drops

i have GMC acadia 2008 with 200,000 Kilometers on it,the problem is with rpm while driving at normal speed 80 or 100 KM/hr .suddenly the rpms drop from 2000 to 1500 with jerks.and then i push the ac...

Fuel Problems Ideas Why

It wont start without putting fuel in carborator how many fuel filters is there

1990GMC5.0Parkinglights&Hornnotworking

2008 Envoy - Intermittant RAPID Battery Drain W/ Key Off

2008 GMC Envoy . . Rapid Battery Drain (12.5 down to 5.0 in 2 hours) . . Related symptoms or oddities - NONE (no lights on, no noises or sounds, nothing). . Frequency of problem occurring - 3 times du...