Question about 2003 GMC Sierra

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No power i have 2003 gmc 5.3 ck engine light reads reduce engine power also read stability sys disabled when you start up has no power have to start a couple times to get power to go code is p1516 in the computer dose not o this all the time

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The problem may be located at the connector on the throttle body. The terminals can be loose, broken wires inside the the plastic where you cant see them, and corroded grounds.

If you can get the check engine light to shut off, try wiggling the wiring from the connector on the throttle body from the connector out to at least 4 inches to induce a check engine light. Clean and tighten the grounds on the engine block also.

Good luck finding the problem.

Posted on Dec 13, 2009

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Posted on Jan 02, 2017

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I just bought an 2004 Tahoe LT and the reduced engine power light is on. And, the stability sys disabled light is on what does this mean


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Trac stabilizer light on, check engine light on, engine power reduced


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What does "Reduced Power, Traction Fault" mean?


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Read these posts for more trouble code information
http://ricksfreeautorepairadvice.com/p0128/
http://ricksfreeautorepairadvice.com/abstcs-light/

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when ever there is a problem , have the fault codes read first
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1 Answer

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2 Answers

What is wrong when it is showing REDUCED ENGINE POWER &STABILITY SYS DISABLED


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1 Answer

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