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Posted on Jan 02, 2017
There are not two rods, there are two clips one under fender weild and one right above the light on top of the cover. Pull up on these two clips and pull the light forward a couple of inches and remove the dust cover. You have to take the air filter cover off to be able to reach in and replace the light. It took me about 10 min to figure these out but hope it helps out.
Posted on Jan 14, 2009
no need to replace the throttle body , and i think that you make a test before to buy any piece . disconnect the negative battery terminal few minutes, then connnect and start engine again, drive few minutes by observing the engine, if light comes again, replace only map sensor ,good luckl
Posted on Apr 24, 2009
SOURCE: code p0121 TPS
THERE IS A TP SENSOR BUILT INTO THE THROTTLE ACTUATOR. THESE TRUCKS HAVE BEEN KNOWN FOR A FEW PROBLEMS IN THIS AREA. THROTTLE ACTUATOR IS NOT SERVICEABLE. THE THROTTLE BODY WILL NEED TO BE REPLACED IF IT IS PROVEN FAULTY. THE APP SENSORS ARE LOCATED IN THE GAS PEDAL MODULE. THESE SEND SIGNAL TO COMPUTER TO TELL IT WHERE YOUR FOOT IS, THEN COMPUTER SENDS COMMAND TO THROTTLE ACTUATOR TO OPEN OR CLOSE THROTTLE BASED ON THIS INPUT. THE SENSOR IN THE THROTTLE ACTUATOR DELIVERS A MESSAGE BACK TO THE COMPUTER TO TELL IT WHAT THE ACTUAL THROTTLE POSITION IS. IF THESE SIGNALS DONT MATCH(WHERE THROTTLE IS COMMANDED AND WHERE IT ACTUALLY IS)THE CHECK ENGINE LIGHT WILL ILLUMINATE AND THE VEHICLE COULD GO INTO A REDUCED POWER MODE. HOPE THIS HELPS YOU!
Posted on Sep 07, 2009
SOURCE: Code P0121 on 2006 GMC
Classic signs of idle air control not able to cope with sudden engine loads. Cleaning should resolve this. Remove ducting from air cleaner to throttle entrance. Spray with carb. choke cleaner or WD40 spray and wipe back to the alloy finish. clean the the throttle plate and push the throttle open with your fingers and clean in behind as best you can. Clean the passageways to the idle air control valve. Remove the valve and give it a thorough clean up. Reassemble and it should all be good.
Posted on Nov 11, 2010
Cleaning the throttle body is certainly the right thing to try first. Make sure you clean the throttle plate as well.
Posted on Nov 29, 2010
Testimonial: "Thanks. It seems to have worked."
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