GMC SIERRA ENGINE SYMPTOM

Severe Missfire At Or About 3000 Rpm, Runs Fine Below Those Rpm

I Recently Changed The Oil In My Truck And Then Noticed While Driving Over 60mph There Is A Knocking Noise. It's Not Immediate When I Go...

Until The Gas Gauge And Temp Gauge Move. The Gas Gauge For Sure. The Ignition Has Power As The Accessories Work. The Happens Virtually Every...

My Son Took My Truck Off Roading In The Feilds. Of Course He Got Stuck In The Mud. With Shovles And Friends He Got It Backed Out And Ran...

1995 Gmc Sierra V8 Two Wheel Drive Automatic 250k Miles Had The Alternator Replaced On Wednesday Morning Since It Was Faulty And Not...

I've Already Replaced: Map Sensor, Plugs, Fuel Pump, Sending Unit, Fuel Pump Relay, Coil, Plug Wires.

Engine Mechanical Problem 1998 Gmc Sierra 6 Cyl Two Wheel Drive Automatic Hello, I Have A 98 Gmc 1500 Siera, 4.3 Vortec Eng (v6)...

94 Gmc Truck Quite Running Sit For Awhile Then Started Back Up Run For Awhile Again Then Quite. Replaced Rotor Bug, Dist. Cap, Pickup Coil...

New To The Forum And A Pretty Vague Question That Matches My Mind. Truck Was Running Fine And Now Nothing. Turns Over, Plenty Of Gas...

Sierra 3500 Had Motor And Transmission Replaced 2 Years Ago. Ran Great Then Fuel Pump Went Out, Replaced It, The Cap, The Rotor, Plugs...