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2001 Yukon xl SLT 1500 4wd 5.3L Major Electrical Gremlin (New ECM Still won't run HELP!!)
Completely redid 5 major ground points to bare metal w dielectric compound. still running ******. P0300 w mil blinking at startup where it runs ok. then steady on after warm up when operational efficiency decreases as. temp increases. at operating temp (205f+-) no power or response to throttle...- Handy Man
- Post #5
- Forum: Engine & Drivetrain
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2001 Yukon xl SLT 1500 4wd 5.3L Major Electrical Gremlin (New ECM Still won't run HELP!!)
alternator output under full load is 14.2v @ 1200 rpm in prk (frt heater fan hi, rr htr fan hi, a/c compressor on, hi beams, fog lights, rr wndw defrost, drvr & pssngr seat htrs lo, I also have a 12vdc 25A solar panel up top to provide supplemental charging for the 2 grp 26 gel cells that run an...- Handy Man
- Post #3
- Forum: Engine & Drivetrain
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2001 Yukon xl SLT 1500 4wd 5.3L Major Electrical Gremlin (New ECM Still won't run HELP!!)
Help!! Multiple DTC's!! 2001 5.3l Gmc Yukon XL SLT 1500 4wd w 190,000 mi Originally Unable to get SMOG Cert due to SES MIL light illum. (or Inc. Cat Monitor) Currently has P0101, P0155, P0300, & p0756 (after replacing ECM, Coils, Wires, & Plugs) Previously had P0171 that wouldn't go away ( the...- Handy Man
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- Replies: 9
- Forum: Engine & Drivetrain
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Did I lose my ECM? 03 Yukon dead in the water
very well written response. Also, right on the money. Had the same (only much weirder random electrical problems) and finally found faulty batterty cables that appeared brand new on the outside. been working great til now. (see my post- Handy Man
- Post #28
- Forum: Engine & Drivetrain
