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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for February 1, 2005
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Open Help Requests for GM
Help Request Answers
1991 Buick Roadmaster Estate Wagon 5.0L heater control valve tubes VIN: 1G4BT5374N
we have this taxi that we have put three heater control valves on the one that comes with the tubes that push on to the heater core it keeps burning a hole in the tube where it turns going up to the heater control valve, we have flushed and added new coolant e...
1990 Cadillac DeVille 4.5L DATA Displays VIN: 1G6CD5330L
Hi All, Here is a challenge for all the computer garus. The heater fan on this Caddy is dead. The customer drove without heat and the battery went dead; not charging. All fuses are good and heater fan fusible link is ok. MIL is on, Electric Climate Control and...
1993 Chevrolet S10 4.3L Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: 1GCCS19Z8P
Hello Fellow Techs, I have a 2wd s-10 that we installed a clutch and repaired cap rotor and wires also put a catalytic converter on,( plugged solid). test drove kept stalling out running rough but not 100% of the time. tap tested vcm thought a possible problem... Trouble codes: 55 (replace ecm)
1996 Chevrolet Cavalier LS 2.4L hyd lifter VIN: 4G1JF32T8T
This thing came in running, but overheating, we performed a block test,failed, sold a head gasket job. no big deal. Got it done, it started,ran 10 seconds and died. Rechecked timing chain ok, has spark, fuel, no compression. let it sit for an hour or two, it w...
1996 Chevrolet Corsica 3.1L No Start, Misfire VIN: 1G1LD55M4T
car towed in no start. Bad fuel smell oil diluted with gas. Removed fouled plugs and replaced with new delco plugs. changed oil and filter. car would barely start and only for a second when held in wot flood mode and would run bad and stall after 15 seconds. s... Trouble codes: P0300
1996 Chevrolet Blazer 4.3L 4whd VIN: 1GNDT13W9T
hey gm gurus: I have a problem with an s10 4whd blazer. It is staying in 4wh high or 4wh low. It will not go into 2wh drive. I have replaced motor, module, servo, vacuum switch; cable is okay. have tried disconnecting 4wh actuator switch and vacuum vent switch...
1997 Chevrolet Lumina 3.1L MIL Lamp on VIN: HJJKU458FR
clear mil light ,comes back on 10/15 miles, i have no exp with domestic vehicles, i don`t even no =of a pattern failure related to these codes is there a cracker jack chevy guy out there, who can shed some light on the p 1675/ p440 codes, thanks Trouble codes: P0440, P1675
1997 Chevrolet Blazer 4.3L Misfire, MIL Lamp on VIN: 1GNDT13WOV
the engine show constent misfire on cyl. #3 has 150 compression has good spark have replaced fuel pressure reg. and return fuel line when truck came in it had 75# fuel pressure not sure how long customer drove like that replaceing return line fix high fuel pre... Trouble codes: P0131, P0151, P0300
1998 Chevrolet Blazer 4.3L Transfer case VIN: 1GNDT13WXW
Hello Everyone, This vehicle came in because his 4x4 would not engage. His indicator lights on the dash would show it in 4 wheel drive but the front differential wasn't engaging. I ran the transfer case functional test and it failed the last step where codes w...
2002 GMC Safari SL 4.3L Excessive Emissions VIN: 1GTDM19XX2
Cannot get catalyst monitor to run. Originally came in with evap code. Replaced canister purge solenoid, cleared code, and set cust back to emission station. Wisconsin will not pass a 2002 vehicle if 2 monitors have not run. The way I'm reading it is the evap ...
2003 GMC Sierra 3500 SLE 6.6L Hesitation VIN: 1GTJK33133
Customer brought this truck to a transmission shop complaining of hard shifting at [...]. The tranny shop spent some time with it and says that it is not transmission related. Now it comes to me. This truck is a 1-ton 4x4 dually fully loaded with oilfeild e... Trouble codes: 1093 (fuel rail pressure low during power enrichment)
1991 Pontiac Grand Prix SE 3.4L Poor Idle Quality, Stall VIN: 1G2WJ54X1M
stall at idle, starts right back up makes no diff. park or in gear. previous shop says crk. sensor and e.c.m. i think b+ and bad module any help?h
1992 Pontiac Grand Am SE 2.3L Oil consumption and pressure VIN: 1G2NF5438N
Hello Tech's...One of my customers just purchased this car and dropped it off here this morning with the following complaint. He said within a couple of minutes of starting up the engine it will begin to smoke a bluish/white VERY heavy smoke that worsens as th...
1994 Pontiac Grand Prix SE 3.1L tcc,4th code 80 trans component slippage VIN: 1G2WJ52M0R
This vehicle will lose lockup and then 4th gear when warm. Code 80 transmission component slippage was retreived. Clear code and trans shifts fine for about 3-4 miles then computer commands tcc off then drops to 3rd gear. We replaced tcc regulator valve with S...
1996 Pontiac Bonneville SE 3.8L Heater VIN: 1G2HX52K3T
We have a 1996 Bonneville Se. Our problem is that there is no heat coming out of the drivers vents. It does blow air but it is not nearly as hot as the passenger side and it does not seam to be as powerful either. this does not have dual climate control. We re...
1999 Pontiac Grand Am SE 2.4L mil VIN: 1G2NE12T4X
This vehicle has an MIL on on the right side if the instrument panel. This vehicle has 2 MIL Lamps, one on the right side of the panel and one on the left side of the panel. I have tried to scan the vehicle using an OTC Genisysy system with 2003 software. The ...
2000 Pontiac Grand Am SE 2.4L abs VIN: 1G2NE52TOY
when the traction lite comes on after driving for awhile the shift points when coming to a stop and then driving away seem to be quicker and you cannot turn the traction lite off with the traction switch. if you turn car off and then restart engine the lite ma...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Buick LeSabre Custom 3.8L Serpentine Belt VIN: 1G4HP52K8X
WOW! Thanks for all 23 replies and their are still coming in. As most of you said the brown O-ring that did not come with the upper manifold was left out. Inserted the O-ring and all was quiet. Sure did sound like the belt squealing to me. Thanks again!
1985 Cadillac DeVille 4.1L rear drum brakes VIN: 1G6CD478OF
Remachined drums (these are top quality items, not no-names); helped, but not completely; changed the valves on the m/cylinder which meter fluid to the rears (there is NO conventional metering valve on these vehicles by the way; metering is controlled by these...
1996 Cadillac DeVille 4.6L seat heaters VIN: 1G6KD52YXT
Sorry about the delay in closing. Customer has been out of town. Sounds like it is common for the grids in the elements to break, but maybe not all 4 at once. As for replacing just the seat cushion heater and re-wiring to by-pass the other, probably not the be...
1994 Chevrolet Astro 4.3L Harsh shifts VIN: 1GNDM19WOR
Thanks to all of the wonderful people that replied. Any one of you could have been right but, three of you have had experience with the PCM not suppling the amperage to the Pressure control solenoid that the scanner said was being sent. The fix was to install ...
1997 Chevrolet Astro 4.3L Cuts out, Misfire, MIL Lamp on VIN: 1GNDM19W9V
vehicle has not yet returned for service.the most likley fix i recieved related to the o2 wiring harness connector .i will check that next time i see the car. thanks to all for the help.will advise upon repair Trouble codes: 300 (random multiple missfire), 132 (bank one o2 sensor voltage high), 152 (bank two o2 sensor voltage high).
1997 Chevrolet K1500 5.7L Misfire, MIL Lamp on
thanks to all who replied, i appreciate all the helpful thoughts sent by you great members. special thanks goes to larry from big tex, the fel-pro pt. number [...] he suggested is an improved design over the old orange and black plastic units. i strongly su... Trouble codes: 0300 (multiple cyl misfires).
1997 Chevrolet Malibu LS 3.1L gauges and codes VIN: 1G1NE52M5V
after pulling hair out and back probing wires, repaired bad wire to bcm from ac fuse under dash,, then car would not start, finally realized bcm would not recognize key,, replace ignition switch and all problems went away!!! Trouble codes: P0134, P0300, P0135, P1654.
1997 Chevrolet Cavalier 2.2L No Start, Stall VIN: 1G1JC1242V
Thanks everyone for your help. Here is what we have done and what's planned; We removed the used module and coil pack and reinstalled the original. The tech who loaned them to us also had used crank and cam sensors so we installed them. Also we removed and ins... Trouble codes: P0335 (crank sensor), P0341 (cam sensor).
1999 Chevrolet Malibu 3.1L Cylinder #2 VIN: 1G1ND52MXX
After a week of scratching my head, here's the fix. Thanks to everybody for their suggestions! The backfire was caused by having the #2 and #6 wires switched. I still don't know exactly how I managed to miss that. After I switched #2 and #6, the backfire was...
1997 GMC Jimmy SL 4.3L interior lighting VIN: 1GKDT13W6V
Thanks to those who replied. we were looking for a wiring diagram and connector view of the remote actuator module and we found one through Standard Plus tech services. With the connector diagram we were able to remove the ground wire for the lights and all ok...
2003 GMC Savana 3500 6.0L Accessories VIN: 1GTHG35U93
well its definatly fixed it was an ignition switch which was a guess ,but then the new switch from the dealer was bad and the truck wouldnt start, evidently there is a problem with them. The new bad one would send power down ign 0 with the key off and it would...
1995 Oldsmobile Silhouette 3.8L Charging VIN: 1GHDU06L5S
thanks for your replys when it stopped charging again i checked all wires again put 12 volts to L pin on alt charged replaced pcm works fine now thanks again
1996 Oldsmobile 88 Royale 3.8L MIL Lamp on VIN: IG3HN52K7T
i was advised to check the MAF and TP sensors - data from them appeared normal, but the MAF would jump around a bit if i tapped it lightly while opening the throttle and ONLY WHILE OPENING THE THROTTLE!?. it was replaced and the code has not returned! thanks! Trouble codes: P0106 (MAP sensor out of range).
1993 Other GM allegro bay 7.4L power steering fluid VIN: 1GBKP37N3P
Well the Motor Home hydroboost problem is fixed. We received 11 replies to our help request and are very thankful to all that sent ideas. Richard from Arkansas hit it right on the head. The park brake servo needed to be adjusted. When it needs adjusted the ser...
1995 Pontiac Grand Am SE 2.3L heater core VIN: 1G2NE15D7S
Hey guys, just want to thank everyone for there replies to my help request. I checked over everything anyone suggested. Just to be safe i replaced the water pump again with a genuine gm. I also replaced thermostat and gasket, coolant fan relay, computer . I'm ...
2001 Pontiac Grand Am SE 2.4L Inst cluster,radio. VIN: 1G2NF52T61
Thanks for all the replies! Many said check the ignition switch closer. We finally got the car to 'act up' and ignition switch proved to be the problem!No power being sent to the cluster or radio.Thanks to all that replied!
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