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Prev Professional Automotive Repair Technical Discussions for October 3, 2012
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Open Help Requests for GM
Help Request Answers
2000 Cadillac Seville SLS 4.6L Stall, MIL Lamp on VIN: 1G6KS54Y7Y
Hey all Im stumped this cady came in with a p0102 mass air low voltage code . I checked the sensor plug harness and found circuit #139 has no voltage both a and c grounds are good b and e sigs are 5 volts the problem im having is alldata and others show the 13... Trouble codes: P0102
1994 Chevrolet K3500 Cheyenne 6.5L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 1GCHK34F6R
Truck came in crank no start. No pressure to fuel filter. Lift pump was bad-installed new lift pump and filter. Tried to start and would not. Verified main injection pump was bad as well and ordered replacement. Installed brand new Stanadyne unit complete with... Trouble codes: 17 (High resolution circuit fault), 18 (Pump cam reference pulse error), 35 (Injection pulse width error/response time short), 36 (Injection pulse width error/response time long), 54 (Pcm fuel circuit error), 88 (Tdc offset error)
1996 Chevrolet Tahoe LS 5.7L Misfire, MIL Lamp on VIN: 1GNEK13RXT
this for gm puzzle.truck came in coolant leak from lower intake gasket. replaced lower, upper all other gaskets. mark distributor before pull. re-installed same at the mark put back together. missfire engine service soon light on and flash, check code po300 ru... Trouble codes: P0300
1997 Chevrolet K2500 Suburban LT 7.4L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 1GNGK26J1V
Thanks ahead time for any help you guys can offer. I have this 97 big block chevy suburban 454 that at first came with misfire code p0300 . Replaced wires , plugs and 3 different caps and 1 injector. my scanner showed misfire first on #4 mainly and some on #7 ... Trouble codes: P0300 (Random misfire)
1998 Chevrolet Blazer 4.3L Odometer VIN: 1GNDT13WXW
Speedo works but odometer does not. Trip meter works though!! We put Snap-On scanner on vehicle and no odometer reading shows but speed registers. We suspect cluster but do not want to guess. Thanks for any help.
1999 Chevrolet Silverado 1500 5.3L transfer case VIN: 1GCEK19T0X
ok people need a little help on this one and thank you .this truck is stuck in 4 hi. did all the tests on the wires grounds and b+ all checked good and yes i loaded the wires. i then thought front actuator because on removal it was stuck out, ok new one and no...
2006 Chevrolet Cobalt LS 2.2L idles too fast VIN: 1G1AK55F36
Hello and thanks: I replaced the MAP/Baro sensor in this Cobalt which required R&R the throttle body (electric throttle type). I went further than I needed to by removing it from the car and cleaning it (very carefully of course). Also cleaned underhood ground...
2007 Chevrolet C6500 Kodiak C6E042 7.8L Parking VIN: 1GBJ6E1357
What should be a simple system is getting me. Driveshaft mounted parking brake, with mechanical lever pulling a mechanical arm. But not holding, adjusted cable all the way, and if adjust lever all the way it might hold, but you have to pull so hard to set it. ...
2010 Chevrolet Express 1500 4.3L fuel pump VIN: 1GCUGADXXA
Hello all, We have a 2010 Express 1500 in here for a intermittent crank/no start. The customer told us they just had it at another shop for the same problem and they had replaced the fuel pump. I thought I remember seeing something awhile ago from GM on these...
1999 GMC C2500 Sierra SLE 5.7L Poor Idle Quality, Misfire VIN: 1GTGC24R7X
I have instsalled a new updated injection from central SFI to MFI on this vortec and this truck isnt running on #5 #7 #6 #8 it is still reading full rich and at about 2500 to 3000 rpm it clears up fuel trim reads -30 on both banks and o2s read full rich at idl...
1996 Oldsmobile Aurora 4.0L oil pan gasket VIN: 1G3GR62C1T
I have a question for any gm tech (especially cadillac) that could offer some advice on an oil leak. I have a 1996 oldsmobile aurora with a 4.0l engine that is leaking oil from the oil pan and oil manifold gaskets. The customer wants to keep the car and do add...
2000 Pontiac Grand Prix SE 3.8L No Start VIN: 1G2WJ52K4Y
Hey guys need some help on this one does this this pontiac have a bcm and vtd module alldata is not giving a good description on a 2000 model! need to get this pon figured out! it starts and runs for about 5 seconds and dyes with the the theft light flashing t... Trouble codes: P1629

Fixes & Summaries for GM
Fix/Summary Answers
1993 Chevrolet Corvette 5.7L Poor Idle Quality, Hesitation VIN: 1G1YY33P4P
Well after replacing the distributor, spark plugs,and fuel filter car ran much better. However code 26 would set after each start. I eed to thank Bill Folmar for pointing out that I checked the EVAP solenoid and found it was an open circut. Replaced the soleno... Trouble codes: 16 (low resolution pulse frailure), 22 (TPS to low), 26 (Quad driver module 1 fault), 32 (MAP sensor or EGR circuit fault).
1998 Chevrolet Tracker 1.6L speedo
i am going to go out to some local junk yards that do not remove parts for u and see if i can find one thanx to all and no dealer has it it is discontinued and pac and speedo world do not make them. hope i can find one thanx
2003 Chevrolet Impala LS 3.8L MIL Lamp on VIN: 2G1WH52K13
thanks for everones help. customer never return for his appointment. have some new ideas to diagnose it with Trouble codes: P0420 (cat efficiency bank 1).
2008 Chevrolet Express 3500 6.6L Cac Piping VIN: 1GBJG31688
1993 GMC G2500 Vandura 5.7L Stall VIN: 2GDEG25K9P
I am not completely satisfied the problem has been resolved, however, this is what has transpired, We ended up replacing the ecm at the customers request. He had recently installed a reman unit, so we did and he is satified as of today. One problem was discove...
1999 GMC K1500 Suburban SLE 5.7L No Start VIN: 3GKFK16R6X
First & foremost I'd like to thank the over whelming response & help from the members here at IATN. Within 2 hrs I had many, many helpful & intelligent response. A TON of information! I rattled my brain attempting to fix this vehicle! The FIX: The fuel pump!!...
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