Reduced enine power , engine warning,and taction control lites come on at same time. i own a 2003 gmc denali.i have had it to an experienced GMC mechanic and so far have changed the throttle position sensor , throttle body,and throttle position module located on the firewall with no results. HELP !!!

SOURCE: 2003 GMC throttle position sensor

I had the same problem with my 2003 denali and came to find out that it was the battery causing the problem. the battery with sufficient power will dictate the tps. if the battery is low or bad, it won't have enough juice to allow the tps to. work. get your battery checked.

SOURCE: display on dash reads

Is this a gas or diesel? Usually this is to protect an engine if there is a fault found by the truck's computer. It can be related to oil level, temp, or pressure. Could be related to the antifreeze. Check the levels. Also you said something about a headlight being dim. So You will need to check that Curcuit out as well. Could be related but a scan-tool would be needed to look a parameters.

SOURCE: locting the throttle position sensor on a 2003 gmc

The throttle position sensor is located on the throttle body. Which is in the front of the intake manifold.

SOURCE: where is the camshaft position sensor located on

It is located at the front of the engine under the crankshaft harmonic balance. Real easy to get to and replace.

David Burbee

• 1871 Answers
• Posted on Nov 10, 2010

SOURCE: 2003 GMC Denali. Reduced Power Light and power.

Hello! Can you send a more detailed explanation of the fault...Guru....saailer

I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

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