Question about 2003 GMC Sierra 2500HD
Having a reduced engine power notice on dashboard
If this is "fly by wire" throttle, any misalignment between gas pedal and TPS will cause this issue. Failure of the gas pedal sender is so common Lokar company makes a replacement pedal unit that is much better than stock.
Posted on Jul 13, 2015
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Posted on Jan 02, 2017
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.
Posted on Nov 19, 2009
Yes, faulty O2 sensor will change the air/fuel ratio and although a small amount of extra fuel can produce more power, both an excess and insuffcient amount of fuel will rob an engine of power.
Posted on Feb 06, 2015
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