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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 8, 2011
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Open Help Requests for GM
Help Request Answers
2001 Cadillac DeVille 4.6L No Start, Cuts out, Stall VIN: 1G6KD54Y71
This car came in for a intermittant stalling and no start. We replaced both crank sensor (NAPA) and a MAF sensor, but still intermittantly stalls out. It will only stall out or cut out during idling. Fuel pressure at 38psi idling, sometimes falls to 35psi, but...
2004 Cadillac CTS 3.6L Electronic VIN: 1G6DM57764
Hello gm guys I have a 04 cts the car came to me with the Ac not working customer said it had a leak in with they put die in it a year ago. I looked for a leak a spotted a leak at the condenser there was not alot of frown in the car. I replaced the condenser f...
1990 Chevrolet C1500 WT 4.3L Mechanical VIN: 1GCDC14Z7L
Hello , the a/c pump failed ,speading metal thru the system. Replace the a/c comp. Accumalator, [...] in color orifice tube and flushing the system condenser, evap and hoses. Evac the system/recharge. The a/c dose not cool the low side pressure is 60-70 psi an...
2000 Chevrolet S10 2.2L passlock VIN: 1GCCS1955Y
The ignition key cylinder with the hall effect is bad. They are quite expensive and the customer does not want the passlock fixed it possible. I heard if you put a resister in the yellow 5 volt wire at the cylinder, to drop it to about 2.5 volts and let it re-...
2003 Chevrolet Impala 3.8L excessive idle speed VIN: 2G1WH52K63
Uggh... This Impala came in with the complaint of a sticky throttle just off idle, like so many of these 3800's have. I removed the throttle body and cleaned the bore and plate, reinstalled it and road tested. All seemed good. After the customer picked up the ...
2006 Chevrolet Equinox LS 3.4L blower resistor VIN: 2CNDL13F36
I have this Equinox with a melted electrical connector at the heater/ac blower resistor. I have replaced the resistor pigtail on lots of other GMs but on this one the dealer says the only thing they can get is the plastic connector w/o any wire terminals and n...
2008 Chevrolet Trailblazer 4.2L Misfire VIN: 1GNDT13S68
Thanks to all who respond. Mostly when cold under accel It misfires and then backfires out the tailpipe. Misfire monitor shows everything ok, no codes, fuel pressure is good! Any advice would be great thanks!
1990 GMC C6000 C6D042 8.2L No Start, Fuel in oil VIN: 1GDM7D1F5L
No start with fuel present in crankcase
2004 GMC Yukon SLE 5.3L Misfire, MIL Lamp on VIN: 1GKFK16T54
Vehicle came in with the check engine light and hard starting. It had a bunch of codes so I cleared them and p0342 and p0200 came back as hard faults. Ive been chasing the p0342. I tested for the 12v supply to the injector as it was good . I probed the signal ... Trouble codes: P0342, P0343, P0200
2004 GMC C6500 Topkick C6C042 7.8L starter VIN: 1GDJ6C1336
Hello. This C6500 truck intermittently has no crank. I replaced the electrical portion of the ignition switch. This truck sometimes goes two and a half weeks with no problems, then only when cold in the mornings it will not crank. I found a wiring diagram fo...
2004 Pontiac Grand Am SE 2.2L compressor VIN: 1G2NF52F94
vehicle came in with low refregerant,static psi 50 L/side,60 on H/side.Recovered refregerant and added 1lb.Had car running and noticed inlet and outlet of evap core lines were icing up on the outside.Pressures were 30 psi L/side and 170psi H/side. Compressor w...
2001 Saturn L300 3.0L No Start VIN: 1G8JW52R01
Towed in and customer thought it needed a fuel pump. Upon inspection of the basics, there was no power to the fuel pump. After performing scan found several codes in the system. Based research that I have done so far, I have opted to remove the ECM and test th... Trouble codes: B2623 (u2105-), U2105 (b1000-), B1000 (u1000-), U1000 (u1016-), U1016 (u1024-), U1024

Fixes & Summaries for GM
Fix/Summary Answers
1991 Cadillac DeVille 4.9L Poor Idle Quality, MIL Lamp on, no communication VIN: 1G6CD53B7M
Ended up being a bad PCM. Finally got it to act up for a longer period of time, gave the PCM a sharp rap on the side and the communications line came back to life. Replaced ECM and all is good. Trouble codes: 52 (PCM Memory Reset).
2005 Chevrolet Suburban 1500 Z71 5.3L rear blower fan VIN: 3GNFK16ZX5
problem #1 was not finding the correct wiring diagram for this system in all data. located the correct EWD in model year 2004. the tsb for module failures causing similar problem did not apply to this vehicle. could disconnect module in rear control panel and...
2000 Pontiac Grand Am SE 2.4L Stall, Misfire, MIL Lamp on VIN: 1G2NF52T7Y
i want to thank everyone for your help i ended up putting 2 coils and the coil housing car run great. thanks agian Trouble codes: P0300.
2005 Pontiac Montana 3.4L No Start, Cuts out VIN: 1GMDV23E65
Although I had been tempted, too, to replace the ig sw I couldn't find the smoking gun. Good thing since apparently it is ok. The issue with the starter switch turned out to be the 60a headlight fuse I pulled so I could trace wires without running down the b... Trouble codes: P0128 (Tstat temp below norm), P0455 (Large evap leak), P0327 (Knock sens low input), P0520 (Op sw circ).
2006 Saturn Relay-2 3.5L all wheel drive VIN: 5GZDX23L76
The problem with the tires being different speeds was turning off the awd. Reprogram the abs mod and the problem went away. 3 problems wires, w/bearing and bad abs mod.
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