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Prev Professional Automotive Repair Technical Discussions for November 14, 2004
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Open Help Requests for GM
Help Request Answers
1995 Buick Riviera 3.8L compressor VIN: 1G4GD2213S
Hello everyone, Customer complained of a missing condition. I found that the AC compressor is cycling off & on real fast, not like it does when it is low on freon, much faster, I verified that the voltage was turning off & on at the compressor. The ground was...
2001 Chevrolet Malibu LS 3.1L Electronic VIN: 1G1NE52J01
Have an unusual code setting: U1040 signifying loss of EBCM/EBTCM communications. No ABS light triggereing or any really that abnormal. Had a look in the left front wheel well area for the EBCM and noticed some corrosion on the body of the unit, however nothin...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Chevrolet C1500 Suburban 5.7L starter VIN: 3GNEC16R8V
This was a tough one to find. I thought I had it when I found that the female connector in the relay block to terminal 30 at the starter relay was damaged and loose. Replaced the connector and all seemed fine for two days here at the shop. Returned it to custo...
1996 GMC C1500 Sierra SL 4.3L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 2GTEC19W7T
Well, after checking several of your suggestions, I sent it to Chevy. They verified that ignition and fuel delivery were fine, and all sensors within parameters. By the way, befor I replaced the intake man gaskets, the truck did have a slight intermittent miss... Trouble codes: P0300 (Random misfire detected).
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