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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 4, 2006
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1988 Chevrolet C1500 Cheyenne 5.0L Hesitation, Misfire VIN: 2GCDC14H7J
Help. This truck runs OK with the timing connector disconnected, which prohibits PCM control of timing. Of course, this turns on the check engine light. With base timing set to specs and pcm controlling timing, the vehicle will intermittantly ping, hesitate, b...
2003 Hummer H2 6.0L seat heaters VIN: 5GRGN23U03
We have this hummy that all intermitently will turn on the drivers side seat heater with out touching switch .At times the temp will go up and down. while watching tech 2 found that the data showes that switch was inactive yet seat module changes temp up and d...
1996 Oldsmobile Bravada 4.3L Excessive Emissions, Poor Idle Quality, Surge, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 16HDT13W9T
At this time engine surges at idle, engine is rough at idle. Mifire counters show cylinders 1,3 & 5 misfireing at idle. As soon as throttle is moved off of idle misfired disappear, surge disappears and engine vacuum climbs to a normal 18-19 in HG. I have perfo... Trouble codes: P0300 (random misfires)
1997 Pontiac Grand Prix GT 3.8L Heater blower motor and day time running lights VIN: 1G2WP52K4V
When blower switch is set to blower speed settings 1 thru 4 blower motor inop and auto head lights inop. When blower is turned onto high blower will operate and the day time running lights will operate. when the fan is off the DRL will work. I have checked the...
1998 Saturn SW2 1.9L Excessive Emissions, Poor Idle Quality, hard to start VIN: 1G8ZK8278W
Vehicle is cranking and idles high ,at 1140,can't bring down,checked for vac leaks with propain,STFT is stuck on negative 50%,air fuel ratio is on 13.6 to 1.When it sits the fuel pressure gauge will drop fast with key on and has to have trottle floored to star...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Cadillac DeVille 4.9L Suspension VIN: 1G6KD5ZBXR
found ipc faulty . was generating error message with no input from the ride control computer .ride computer was previously bypassed.
1990 Chevrolet Corvette 5.7L 2nd gear & 3rd gear VIN: 1G1YY2383L
ok well it wasn't a easy fix but its done. evedently someone else was in and cleaned out the pan because i seen no metal in the pan when i droped it but when i took it apart what a mess. oneway sprag was broken and i found the wrong govener in the trans also t...
1996 Chevrolet Lumina LS 3.1L Misfire VIN: 2G1WN52M8T
thanks to everyone for your great ideas to solve the problem. the customer has not returned with the same problem so I can only assume that I may have installed bad spark plugs two times in a row.thanks to all for your time. Trouble codes: P0300.
1997 Chevrolet Blazer 4.3L headlights VIN: 1GNCT18W1V
vehicle still did not return to friends shop, so i will close with the info received, and add when repaired. tracy states drm located next center console/drivers side section of dash close to firewall. 8 pin black connector which looks as follows: with connect...
1993 Pontiac Grand Am SE 3.3L No Start VIN: 1G2NE14N8P
after 2 weeks of this vehicle in our shop we decided to punt. we have at least 30 man hours in this vehicle. everybodys help was great checked everything at least 3 times. we even brought in a gm dealer mechanic that said he'd seen it all and caan't explain th...
1996 Pontiac Grand Am SE 2.4L Poor Idle Quality, Misfire VIN: 1G2NE52T3T
Hey everyone, sorry it took so long to close this. HAven't been able to fix this car yet. It is a trade in and the boss doesn't want to spend too much more money on it..or tie up a stall. I did do a little further testing and found one leaky injectior we chang...
2005 Pontiac Grand Am SE 3.4L Dask lights & starter VIN: 1G2NE52E45
Well guys I still don't know if this one is 100% fixed or not. I changed the ignition switch and the car acted fixed. But then a a bunch of starts the car quit working again. I had a coud U1000 & B1369 one was loss of communication the other was ignition 0 inp...
2002 Saturn SC1 1.9L Misfire VIN: 1G8ZN12832
i put saturn plugs and wires in it and haven't heard from her yet. its been 2wks. when we first did tune up we used after market parts. i read on iatn somewhere to use oem on saturn cars. thanx to all who helped me. Trouble codes: P0300.
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