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Prev Professional Automotive Repair Technical Discussions for September 27, 2014
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
2002 Cadillac Eldorado ESC 4.6L heating system VIN: 1G6EL12YX2
customer came in and said he has no heat. upon initial inspection, i noticed the upper and lower radiator hose was hot, however i have no heat and the car would only warm up occasionally on the rivers side and the pass side is ice cold, i see the blend door ac...
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1985 Chevrolet Corvette 5.7L No Start, Cuts out, Stall VIN: 1G1YY0781F
Vehicle has been sitting for a couple of years. Has after market Clifford alarm system with remote start. Put new battery in key fob and reset alarm to allow for proper function. Charged the battery on car and vehicle will crank, start, and then shut off immed...
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1997 Pontiac Grand Am GT 3.1L Misfire, rich VIN: 1G2NW52M8V
Now I have it together and has consistent mis on 4 and 5 mostly 5. LT -16, if I create a vac leak it will go full lean. Fuel injectors will hold 40 psi when isolated away from system. Have a known good injector anyway on #5. MAF was reading low and sluggish... Trouble codes: P0300 (testing and results)
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Fixes & Summaries for GM
Fix/Summary Answers
2004 Chevrolet Suburban 1500 LS 5.3L Starting VIN: 3GNFK16Z64
This one ended up being the PCM. Mark from Newfounland nailed it. Had voltage on C1 pin 39 when cranking. The PCM would not energize the starter circuit. Sent to dealer for install and program. Thanks for the help.
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2006 Chevrolet Corvette 6.0L Clutch VIN: 1G1YY26U86
The problem was the clutch master cylinder as many suggested. The spring on the clutch pedal was ok. The fluid was always full so there was no leak. My tech removed the l/s cat to get at clutch slave bleed. we opened the bleeder, pumped the pedal and very litt...
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2001 GMC Yukon XL 1500 Denali 6.0L Misfire VIN: 1GKFK66U01
THANK FOR THE REPLIES GUYS.THIS TRUCK IS NOT FIXED. WE TRY PLUGS,WIRES,INJECTORS,DECARBON THE COMBUSTION CHAMBERS,CLEANING INJECTORS,LEAK DOWN TEST. THE REASON WE WERE NOT CONCERN ABOUT THE COMPRESION TEST VALUES DUE ABOUT 3 WEEKS AGO WE YUKON WITH # 2 AND 7 C... Trouble codes: P0300 (Multiple cylinder miss fire).
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