Question about 2003 GMC Yukon Denali
A flashing CEL (Check Engine Light) is something serious to be concerned about. A flashing CEL indicates that your vehicle's engine is misfiring, which could severely damage your catalytic converters.
Your best bet ,take it to a qualified repair shop .
Posted on Jul 22, 2017
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Posted on Jan 02, 2017
SOURCE: 99 Gmc Suburban
On the 1999 - 2000 5.7 vortec engines the distributor gears wear causing the timing to change 2 or more degrees. The ecm is designed to shut down at 2 or more degreedifference. This is in a GM bulletin that recommends replacement at 160k miles. Mine went out at 150k miles. Very similar driving symtoms until it quit running. Both cam sensor codes were set on mine though, not the crank sensor.
Posted on Aug 24, 2008
SOURCE: Lack of power when accelerating
You really should have a code check done. There are numerous items that can give you similar symptoms. Two places to look are the fuel filter (usually overlooked till they gum up, and the throttle position sensor (but test it first with an ohmeter. You will need a manual (vehicle specific ones are available at most larger parts stores and most of those stores also do code testing free)
Posted on May 27, 2009
maybe your iac valve is not working? it takes place of a choke or temp sender to computer could be bad which controls t I.A.C. known as the idle control valve,do you have any codes?
Posted on Sep 01, 2009
first thing would be to have you vehicle scanned for codes at your local advance or autozone store for free; see what codes you have. would neede more info to go further
Posted on Sep 16, 2009
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