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Prev Professional Automotive Repair Technical Discussions for January 7, 2011
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Open Help Requests for GM
Help Request Answers
1999 Chevrolet K2500 Suburban 7.4L No Start VIN: 3GNGK26J0X
The vehical will start then promptly shut off, checked fuel pressure and spark, both normal, I am sure the problem is with the passlock system, both fuses #21 and #4 that power the module are good. I checked for power and ground at the module connector, all is... Trouble codes: P1626
2000 Chevrolet Corvette 5.7L Stall VIN: 1G1YY22G6Y
Heres one for all you corvette guru's car came in as an emissions failure with o2 codes and p0430 cat ineff codes and rich mixture codes. I replaced all o2 sensors since they were original with 230k i couldn't believe it. After that i got to codes for both ups...
2000 Chevrolet Corvette 5.7L MIL Lamp on VIN: 1G1YY22G6Y
My favorite corvette hasn't been gone long enough, after fixing multiple wiring problems for a start and stall the car has returned to me yet again with these new codes p1133,p1153. I have checked all wiring to and from o2 sensors and pcm, installed 4 new 02 s... Trouble codes: P1133 (Insufficient h02 sensor switching bank1 sensor 1), P1153 (Insufficent h02 sensor switching bank 2 sensor1)
2001 Chevrolet Lumina 3.1L MIL Lamp on VIN: 2G1WCJ52J0
initially the customer brought in the car with the cooling fans always running while car was on. after tracing all wiring and checking relays and the like we found that the PCM was creating the always on condition. We ordered another PCM from the local parts s... Trouble codes: P0650
2004 Chevrolet Cavalier 2.2L Fuel Gauge And Tach VIN: 1G1JC52F74
Tachometer and fuel gauge are stuck beyond the max. Point. If i unhook the battery the gauges work properly until you shut it off and restart it again. Any ideas?
2006 Chevrolet Malibu Maxx LT 3.5L MIL Lamp on VIN: 1G1ZT618X6
Car came in initially with mil on and no power. had codes p0120, p0220, p1516, p2101 and p2135. Cleared codes, test drove, was fine then vehicle goes into reduced power mode intermittently, sets codes P2101 and p2135 traction control turns off and mil illumina... Trouble codes: P2135, P2101, P1516, P0220, P0120
2007 Chevrolet Express 3500 4.8L MIL Lamp on VIN: 1GCHG39V47
I have this 2007 Chevy Van 4.9L that has a P0430 that keeps comming back. The Cat has been replaced twice but with factory GM products. The Up Stream Oxygen Sensor was also repalced. At first it was showing misfires on back 2 with excessive back pressure and h... Trouble codes: P0430 (Catalyst System Low Efficiency Bank 2)
2001 GMC Yukon XL 2500 SLT 8.1L Cuts out VIN: 3GKGK26G71
She went to a dealership recently and they pulled cam code, crank code and fuel sender code. but then scared her away with $4000 in other repairs as well so she fled. she moved here and we talked at length about the vehicle.. Basically, starting from scratch w...
1996 Oldsmobile Aurora 4.0L battery VIN: 1G3GR62C2T
This car came in with customer stating the battery would be dead after the car set 1-3 days. He replaced the battery twice at other shops which told him the alternator was good etc. The car acts like there is a parasitic draw on the battery so we tested the ba...
1991 Pontiac Grand Prix GT 3.4L No Start VIN: 1G2WP11XOM
Car was idling in parking lot and quit running. I have spark and fuel pressure 43 psi. I also have injector pulse and 160 psi compression. Have hooked up injector cleaner and replaced with gas. Will still not start. Crank sensor and module with coils was repla...
1997 Pontiac Sunfire SE 2.2L t-stat VIN: 1G2JB1249V
t-stat not opening after circulating and fan cycling,, test drive cool down it closes and wont reopen until you allow time to equalize at t-stat, once it equalizes it circulates and cycles its collant fan normally until the next drive it overheats again and th...
2003 Pontiac Grand Am GT 3.4L No Start, Stall VIN: 1G2NW52EX3
Knowing that the fuel pump has been replaced and battery and alternator. Customer says it stalled on highway and not started until later when tow truck arrived... I drove it.. Drove fine... After a hot soak it not started.. With fuel gauge on car.. I noticed t... Trouble codes: U1040 (b2958-), B2958 (u1000-), U1000 (u1088-), U1088 (testing and results)

Fixes & Summaries for GM
Fix/Summary Answers
1989 Chevrolet S10 Blazer 4.3L No Start
thanks everyone for your responses. John from new jersey nailed it. I had replaced the distributer but it still didnt start. what I didnt do was check the voltage at the injector while cranking, I only checked it with koeo. It had no power at crank position. ...
1999 Chevrolet C3500 5.7L Hesitation, Cuts out VIN: 1GBJC34R0X
I want to thank everyone for the replies, and once I convinced the owner to take a chance with the fuel pump, as he was having a hard time accepting the fuel pump, since it started with no issue. However, once we installed the fuel pump the truck has good pow...
2002 Chevrolet Silverado 1500 5.3L Excessive Emissions, Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 2GCEK19T72
Unfortunately the customer hasn't returned to have the work performed. It was almost unamimous that the problem is the intake gaskets leaking when the engine is cold and "seal" when warm. Thank everyone for the advice! Trouble codes: P0106, P0171, P0172, P0300, P0440, P0507.
2003 Chevrolet Avalanche 1500 Z71 5.3L Keyless Entry VIN: 3GNEK13T03
Thanks for the quick and helpfull replies. The fix was simply to update the info for the passenger door module. All is good, thanks again.
2005 Chevrolet Silverado 1500 5.3L Poor Fuel Economy VIN: 2GCEK13T75
Sounds like this is the nature of the beast. I don't have the stock air box anymore, I will try a higher octane even though reg, is 1.16$/ltr and will probably change the pre-cat 02's. other than that the fuel trims and all other data is normal. Maybe I will...
2007 Chevrolet Silverado 1500 Classic LS 4.3L Key In Ignition Audio Warning VIN: 1GCEC14X57
I would like to extend my thanks to all the help I recieved on this one. Both front speakers were inop. I first installed the driver's side speaker and what do you know. IT WORKED!!! all the chimes work. installed the speaker in the other door and we have...
2005 GMC C6500 Topkick C6C042 8.1L No Start VIN: 1GDG5C1EX5
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