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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 27, 2006
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Open Help Requests for GM
Help Request Answers
1988 Buick LeSabre Custom 3.8L No Start VIN: 1G4HP54C1J
Here it goes, The customer came in with a crank no start. We quickly determined the crank sensor failure fron damage. We inspected the balencer and found no reason for damage and wrote it off to road debris. Three days later the same problem occured. The senso...
1994 Buick LeSabre Custom 3.8L Cuts out VIN: 1G4HP52LXR
Origionaly came in with a work order stating 'check for misfire'. Checked for codes and none found. Test drove and no trouble noted. Further discution with service writer/owner revealed that symptom only occured 2 or 3 times on drive from Oregon to central coa...
1995 Buick LeSabre Custom 3.8L No Start, Cuts out, Stall VIN: 1G4HR5215S
This vehicle came to us on the hook with a no sart. I checked spark, fuel and codes. Had code 629, good spark, good fuel pressure, and no injector pulse. Also when it came in, with ignition on we heard clicking/buzzing noise from under right side of dash. Foun... Trouble codes: 629 (invalid passkey frequency)
2000 Cadillac Escalade 5.7L Poor Idle Quality, Surge, MIL Lamp on VIN: 1GYEK13R4Y
need help; truck came in with oil & coolant mixed, removed the head and rebuilt heads were installed, after heads installation code p1345 keeps coming on and truck has no power Trouble codes: P1345 (cam position sensor)
2003 Cadillac CTS 3.2L cruise control VIN: 1G6DM57N73
Good day people. I have this 03 Caddy with an intermitted cruise control operation. Cruise control works normally for about 30-60 minutes than will shut off. The light for the cruise control shuts off at the same time. No codes in any computer. Once it shuts o...
1997 Chevrolet Blazer 4.3L No Start, Stall VIN: IGNDT13WOV
Intermittent stall, usually only once a day, while driving, usually restarts right away. It can do it at highway speeds, accel., or decel. or stop sign. No codes. When acting up the 12 volt signal from PCM to fuel pump relay is 0 volts. Fuel pump was replaced ...
1998 Chevrolet P30 STEP VAN 5.7L ABS Module VIN: 1GBHP32R4W
I have taken on this job from another mechanic to fix little glitches after he replaced engine. ABS light seemed to have been on already, but car never ran when it got here. The ABS would stay on when you first started the vehicle and go off, and come right ba...
1998 Chevrolet Prizm 1.8L ignition lock cylinder VIN: 1Y1SK5235W
Hello, Was just wanting to see if anyone has experience with an inoperable ignition lock cylinder, The cylinder will turn just a very small amount, enough to unlock the steering wheel, According to Identifix hotline the shift interlock system should not have a...
1999 Chevrolet Silverado 1500 4.8L ing switch VIN: 2GCEC19V8X
costomer said that he did forget to shut the engine off as it run in his drive way for 2hrs.thats when he feels this problem occured.the trans switch was shorted and connecters melted to housing.making testing impossible.did not crank the next am due to blown ...
2000 Chevrolet C2500 5.7L won't run monitors VIN: 1GCGC24R0Y
I am having a hard time getting this truck to pass a CA smog test.The truck will not run the monitors. Only one of the continous monitors will run out of the three. The misfire monitor will run, the fuel system or the comprehensive component monitors willnot r...
2001 GMC Yukon XL 1500 SLT 5.3L MIL Lamp on VIN: 3GKFK16T41
good morning, problem is this denali i have here , was here 2 days ago with 2 codes as you see in related history , customer had originally brought truck last week complaining of hard starts, and c.e.l. flashing then about a minute after everything would retur... Trouble codes: P0430
2001 GMC Jimmy SLE 4.3L No Start VIN: 1GKDT13WX1
Hope someone can help with this,truck came in for heater core replacement,pretty straight forward,pulled dash,heater module,replaced core. Will not restart,cannot get theft relearned via 3 ignition cycles. Security light never goes off. Cannot communicate with... Trouble codes: P1626, U1064
1998 Oldsmobile Silhouette GS 3.4L MIL Lamp on VIN: 1GHDU03E5W
The van came back after 600 miles with new codes P0172 Fuel Trim rich and P0440 Evap Systems. I have checked most everything. Mode 6 on a Genisys says EGR Cruise fail and EGR Decel Fail. Checking the Digital EGR showed no problems either operating it with a sc... Trouble codes: P0172 (Fuel Trim Rich), P0440 (Evap Emission System)
1994 Pontiac Grand Prix SE 3.4L Unknown VIN: 1G2WJ52X7R
Hey Techs. The Pontiac has an oil leak coming from between the right side of the engine block and the transaxel. I thought It was coming from somewhere in the vally under the intake manifold. The oil is dripping at a prety good rate. Has anyone seen this and w...
1995 Pontiac Bonneville SE 3.8L P/Steering Pump VIN: 1G2HX52K4S
Hi everyone.I have this 1995 Pontiac Bonneville that has a power steering WHINE noise that does'nt seem to change no matter what i do.The old pump was very noisy,same pitch,but was leaking out of the front seal.I replced the pump expecting to fix the problem,f...
1995 Pontiac Grand Am SE 3.1L general cooling system VIN: 1G2NE55M0S
I'm in Texas,which is about 100 degrees or so every day.When sitting in traffic,the temp gauge climbs slowly and will go all the way hot if you let it. The gas probe sniffed trace amounts of exhaust gas in coolant tank so I pulled heads and resurfaced them a...
1995 Pontiac Grand Am SE 2.3L Stall VIN: 1G2NE15D5S
vehicle will start and idle fine.After a few minutes, engine will begin to stumble and stall.Restarts immediately.Repaced fuel filter and did complete fuel check.Air filter NEW. Scanner shows the the fuel trim drop to 0 when stalling.O2 sensor sluggish but the... Trouble codes: 45 (rich)
2000 Saturn LS2 3.0L Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on, Lack of Power VIN: 1G8JW52R9Y
Hello all, I have a Saturn here I'm having some difficulty diagnosing. The customer stated that after replacing the battery, the vehicle bucks and runs rough. The vehicle does run extremely rough, has a noticeable misfire (engine light flashes), stalls occassi... Trouble codes: P0300 (random cylinder misfire), P0302 (cylinder 2 misfire), P0304 (cylinder 4 misfire), P0306 (cylinder 6 misfire), P0171 (fuel trim system lean bank 1), P0174 (fuel trim system lean bank 2)

Fixes & Summaries for GM
Fix/Summary Answers
2001 Buick LeSabre Custom 3.8L blower motor inop VIN: 1G4HP54K11
I apologize for taking so long to close this, but I finaly got a fix report on this car. The car was sent out to the dealer by the service writer before I could get a good look at it. Turned out to be an intermittent open in the fuse block under the rear seat....
1996 Cadillac Eldorado 4.6L A/C compressor VIN: 1G6EL12Y6T
Thanks to everyone who replied, I appreciate your time! Turned out that I installed the orifice tube in backwards, DUH! That also took out the low pressure sensor located in the evaporator inlet, Marty wins the prize. Again THANK YOU VERY MUCH to every one all...
1998 Cadillac Seville SLS 4.6L hvac -ipc display VIN: 1G6KS54Y6W
Thanks to all who replied, especially John [...] from Louisiana. He turned us on to Carey Ubank from AAE inc. We sent the cluster to him and he found a burnt power suuply in the cluster. After he repaired and sent it back to us everything powers up and reads c...
1993 Chevrolet C1500 Cheyenne 5.7L No Start VIN: 2GCFC19K7N
found good ecm truck runs good but low oil pressure the customer didnt tell me about probably had a factor in the ecm shorting out.thanks to everyone that helped
1995 Chevrolet Astro 4.3L speed control VIN: 1GNDM152XR
I want to thank you all for your replies. I checked the wiring and connections to all and they were fine. The speed sensor will put out voltage if working, about 2 volts and as it spins the voltage drops. My diagnosis was the speed buffer taht turns analog to ...
2000 Chevrolet Cavalier 2.2L static VIN: 1G1JC1247Y
replaced the napa fuel pump with oe pump and the noise went away.thanks for all the help.
2003 Chevrolet Avalanche 1500 North Face 5.3L 1st gear VIN: 3GNEK13T93
hi,first i would like to thank those that replied to my help request.the prob was the filter had a crack in it and took out the trans.after rebuild all is well.thanks again bob
2000 GMC Yukon XL 1500 SLE 5.3L Electronic VIN: 3GKEC16T71
High Tech diagnosis & Noraml routine components replacement Fix for this Yukon was the HVAC control pannel second one in roof , there are 2 of these HVAC roof controls. I had to use the services of IDENTFIX the diagnostic procudure it's kinda tricky but not th...
1947 Pontiac 4 door sedan 350CID clock
I received a number of suggestions for repairing the clock. I first sent it to Instrument Services, unfortunately they could not repair it. I initially said the company was Clocks and Gauges, this was incorrect. In fairness to Instrument Services, they mainly ...
2000 Pontiac Firebird Formula 5.7L clutch pressure plate VIN: 2G2FV22G2Y
Due to aftermarket pressure plate, a shim was required between the slave cylinder and front of trans. The shim pushes the slave closer to the pressure plate. It's up to the custome to fix this one.
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