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Prev Professional Automotive Repair Technical Discussions for July 15, 2014
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Open Help Requests for GM
Help Request Answers
2001 Chevrolet Silverado 1500 5.3L knock sensor VIN: 2GCEK19T51
this past Saturday a friend of mine asked me to install two new knock sensors in his 01 Silverado 5.3. knowing that these harnesses fall apart if you cough too hard on them I told him to get that as well. after repair the truck has a intermittent hard start li...
2001 Chevrolet Express 2500 5.7L No Start VIN: 1GCGG25R41
This vehicle has a crank but no start condition. It has good spark and verified timing at distributor cap. Also checked timing with timing light. Good fuel pressure (61psi). Checked injector pulse and fuel injector pressure drop at each injector. Tried removin...
2002 Chevrolet Suburban 1500 LT 5.3L blend door actuator VIN: 1GNFK16Z52
Customer brings in his 2002 Suburban with complaints of it being stuck on full hot. I suspected the blend door actuator, and replaced it. However I did not bolt the new one down. I just plugged it in, and held the actuator up by hand for testing. I'm getting r...
2004 Chevrolet Trailblazer LS 4.2L compressor VIN: 1GNDT13S94
I have no ac clutch engagement,had po530 [pressure switch,installed new dealer part].All pressures are at specs,the ac switch lights up when applied.I can plug relay tester in ac clutch relay with out pluging tester to battery and clutch ingages and cools grea...
2004 Chevrolet Tahoe LS 5.3L Battery VIN: 1GNEK13Z84
This vehicle has a parasitic draw. This first and most easily remedied is the radio, which is drawing about 2 amps at all times. My primary question is this: How long should the BCM be drawing any amount of current? I tend to follow the 50 milliamp maximum...
2005 Chevrolet Silverado 1500 4.8L none VIN: 1GCEC14VX5
found no injector pulse truck will start if carb sprayed in throttle body, fuel press, is 60 psi koeo truck will start sometimes no problem four a minute or two and then dies and it wont start again checked fuses ok,no security codes owner replaced krank senso...
2008 Chevrolet HHR SS 2.0L Poor Idle Quality, Surge, MIL Lamp on VIN: 3GNCA63X98
Customer came in with check engine light on and engine surging only at idle from 700-1000 rpms. Said it was almost dieing at stop lights. I found engine was very noisey, rattles when started. Loud rattles go away in 1-2 minutes. But engine still has some rattl... Trouble codes: P0016 (Ckp to cmp correlation problem), P0089 (Fuel pressure regulator performance)
2004 GMC Savana 3500 6.0L Overdrive Sprag VIN: 1GDJG31U14
This truck has come back 2 times since original rebuild. Overdrive sprag is overheating and the sprag is overrunning causing a no reverse and no move in OD condition. We replaced original drum with aftermarket. The reason we changed the drum originally was du...
2004 GMC Sierra 2500 SLE 6.0L Engine VIN: 1GTHK29U74
Greetings. I have this customers 6.0 gas with a vibration. It is very noticeable and customer states it has gotten worse over the past year. At idle in park or neutral it is there and even worse at approx 1000 rpm. It feels almost like a miss but no misfire co...

Fixes & Summaries for GM
Fix/Summary Answers
1992 Cadillac Seville 4.9L ride control, traction disabled VIN: 1G6KY53B9N
Thanks for all the replies.. I was waiting for the car to return so I could hopefully post the fix but it hasnt come back yet. I learned about the IPC override function.. I was going to put the original cluster back in and check the 3 digit code and use the IP...
1995 Chevrolet S10 2.2L no reverse VIN: 1GCCS1447S
Evening of July 15 and this is to be closed by July 17. This transmission has given me a lot of trouble,the original problem was no reverse input clutch was out.After a rebuild I put it in all gears without moving it off of lift and all the gears engaged li...
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