GMC SIERRA

Truck Listed Above Is An All Terrain. Pulled Out A/c Relay And Didn't Realize There Were Two Ways It Could Go Until I Saw The Diagram On...

I'm At The End Of My Rope. I'm A 25 Year Mechanic And I've Done Everything I Can Think Of To My Truck Listed Above 1500 So I'...

Fuel Pump Will Not Run Or Prime. Replaced The Fpcm And Replaced The Fuel Pump. Fuse Are Good. And The Grounds Are Good. Can Straight Wire...

I Am Working On A Custom Truck That Has Had The Taillights Shaved. When They Did This They Removed The Tail Light Wiring Harness And...

The Low Reference Wire Going To Fpr2 Is Showing 12 Volts. Is This Correct?

New Motor Installed/all Grounds Are On But No 12v To Fuel Pump Relay/no Start Relay Test Good/pump Runs When 12v Jumped From Battery To...

Hey, I Have 3 Gauges Not Working (oil, Temp, Speedo) And Am Afraid It Related To The Ground Connection. Am Looking Under The Hood For...

I Cannot Get The Instrument Cluster To Light Up Mileage, Security, Fuel Level And Temperature Gauge. The Voltage, Speedometer...

I Bought A Non Running Project Truck (listed Above). My Problem Is A Few Actually, First I'm Not Getting Power Or Ground To The Fuel...

Was Getting All 4 O2 Codes, Replace All 4, Cleared Light Now Getting O2 Codes On Both Banks, Makes Truck Hard 2 Start When It's Warm...