20 Most Recent 2011 GMC Yukon XL Questions & Answers

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Short in the wiring or connector pins . Possible short in AC clutch .

Visit the on-line store, known as reliable-store, they have the repair manuals. I'm sure you will get the solution of your problem. Best Manuals

Can be done by a dealer or a shop

The computer turns on the code when the signal is received from the TPS switch on the throttle body.

Bad neutral safety switch? Engine locked?

Make sure trans fluid is full. See owners manual for proper dipstick test.

If fuel pump is new you should have good pressure before injectors, but check pressure anyway. If pressure is low go back and check for a bad fuel filter between tank and engine and replace. Fuel lines get clogged because of moisture in the lines causing rust. Did you replace the under pump fuel filter? Back to front, if pressure is good , injectors may be the problem. Do a compression test to see if your engine is starting to die. I have only given you an idea of what to look for. You will either have to check yourself ,or have your truck checked by a shop. GOOD LUCK FREIND.

Transmission pump.

Try removing the skid plate from under motor then that should allow you to access the bumper bolts. Some of them required removing the grill also. Good luck

Check under seat for object blocking seat movement. Lube mechanism.

Check circuit breaker and wires under seat. Likely bad connection or bad switch. You can pop switch out and check for voltage as use operate it.

Replace stock sender with basic mechanical gauge to see what really up, or take wire from stock sender and ground it to see if gauge comes up to top. If so, replace sender. (NOTE: Do not use teflon tape or any sealer on threads of new sender as this is the electrical path for ground.)