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Prev Professional Automotive Repair Technical Discussions for May 16, 2005
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Open Help Requests for GM
Help Request Answers
1992 Buick Park Avenue 3.8L alternator VIN: 1G4CW53L7N
Hi Guys, I have a Buick giving me a hard time and maybe one of you electrical Gurus can help. The car was brought in with a complaint of battery going dead after a week or so. I checked the charging system and it was not working. This is a gauge with led type...
1997 Buick LeSabre Custom 3.8L engine oil pressure VIN: 1G4HP52K7V
low oil pressure at idle in gear causing oil guage to read low and a red light comes on.with rpms at 1000-1500 oil pressure is at 60 psi remanufactored crankshaft clearances checked camshaft oil pump and suction spun rod bearing we...
1988 Cadillac Eldorado 4.5L stereo VIN: 1G6EL115XJ
I'm interested in hearing from any tech with experience replacing the factory Delco Bose Radio/tape deck with an aftermarket unit. This is my personal vehicle, bought it from the dealership for $100.00. I have an Alpine CD deck I'd like to install. My question...
1989 Cadillac DeVille 4.5L Cooling Systems VIN: 1G6CD515XK
This Caddy has a coolant leak. On the side of the block (front side) there is what looks to be about a 1/4" cast hole right behind the #7 head bolt. Coolant is just running out of the hole. You can stick a small screwdriver straight into the hole. Does anybody...
1992 Cadillac Seville 4.9L Passkey system VIN: 1G6KS53B7N
This my wife's Cadi, and I know little about the Passkey system in this car. So a GM tech that's been down this road before would be a big help. Here's what I have so far. The car will not start, not a peep from the engine. The battery and starter tested out f...
1997 Cadillac DeVille Concours 4.6L Not Ready VIN: 1G6KF5497V
The Vehicle will not set monitor O2 sensor or heater or catalyst only set EGR. Drive trace, Cold Start, no mil, Gm and bulletin drive trace tried.
1999 Cadillac DeVille d'Elegance 4.6L Starting VIN: 1G6KE54Y0X
Hi guys we have this Deville in here customer had it towed in due to overheat. He said that the cluster told him that the coolant was low..he continued to drive it...then the cluster told him that the vehicle was overheating and the vehicle shut down completly...
1991 Chevrolet Corsica LT 3.1L No Start, Stall, MIL Lamp on VIN: 1G1LT53T5M
car came in first time cranks will not start had trouble code 22 & 34 found low voltage to map sensor 5 volt reference & tps 5 volts reference check over & install ecm afer market ecm from napa still same problem check over & found ecm still had to be bad inst... Trouble codes: 34 (map sensor signal low), 22 (tps sensor signal low)
1997 Chevrolet Tahoe 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GNEC13ROV
Thank you for helping me with this automotive boomarang. This truck originally came in with a misfire on cyl#1 and cyl#3. Pulled the spark plugs and noted that all plugs on the right side of the engine were normal all plugs on the left side were black. Further... Trouble codes: P0300, P0301, P0303
1999 Chevrolet Express 2500 5.7L MIL Lamp on VIN: 1GCGG29R9X
Looking for some help with an intermitant code P0102. Actually hoping aomeone has run into this before. While I am montitoring truck everything is great. Done wiggle's and hits to try and recreate. Do not want to throw a MAF sensor at but running out idea's. C... Trouble codes: 102 (MAF Signal low)
1999 Chevrolet Lumina 3.1L engine VIN: 2G1WL52M0X
when engine is cold engine knocks, sound like lifters but after 7-10 minutes of idling, noise goes away. only happens when it is cold. oil pressure is 45psi at idle. i notice when looking into the oil cap that i do not see any oil comming up into the cylinder ...
2000 Chevrolet Express 1500 5.7L brakes VIN: 1GBFG15RXY
Customer claims brakes were never the same since we did them the first time, claims poor pedel and stoping effort. Customer claims the pedal goes to the floor at times,and there is no abs activation when this happens. We were unable to duplicate these symptoms...
2001 Chevrolet Express 3500 5.7L Stall VIN: 1GCHG35R51
Customer complains about van not wanting to idle/starts and dies. It seems to happen hot or cold, but not all the time. When it is happening it will not start unless you touch (and that's all you have to do) the gas. We did a tune up on it several weeks ago an...
2002 Chevrolet Avalanche 1500 5.3L vibration VIN: 3GNEK13T22
any ideas?
2003 Chevrolet Cavalier LS 2.2L cooling fan&ETS control VIN: 1G1JF52F73
The car is clean and fairly well kept, The customer complaint is the cooling fan runs almost all the time. When the fan is running the trac off light in the cluster is on. If the trac light goes off the fan shuts off. The scan data shows normal data 180 to 195...
1998 GMC Safari SL 4.3L No Start VIN: 1GKA19W8WB
no start but runs fine! to start engine you must spray a little carb,/starting fluid in intake. crank engine over it will start fine. shut the engine down, will start again unless let set for more than 5 minutes. after setting crank and crank 20-30-40- seconds... Trouble codes: 1351 (ic circuit voltage high)
1998 GMC K1500 Sierra SL 5.7L Misfire, MIL Lamp on VIN: 1GTEK19R2W
Truck came into shop with engine light on. When scanned, code P0300 random cylinder misfire came up. With Modis hooked up, I watched the misfire monitor. cylinder #5 was the culprit. The customer decided to do a major tune up.(plugs, wires, cap, rotor,and fuel... Trouble codes: P0300 (random cylinder misfire)
1998 Oldsmobile Silhouette Premiere 3.4L alternator VIN: 1GHDX03E7W
intermittent while driving cruise shuts off and numerous lights come on on dash--abs battery sir usaully mil and abs light will stay on VEHICLE NEVER STALLS - CUSTOMER CAN SHUT OFF CAR AND RESET EVERYTHING
1999 Oldsmobile Intrigue GL 3.8L No Start, Stall VIN: 1G3WS52KXX
This vehicle will intermittantly set a code P1626 when starting. When it sets the code, it will barely run. The lock cylinder with pass-lock sensor has been replaced twice. We have replaced the BCM and PCM and done a pass-lock relearn a few times. It always se... Trouble codes: P1626 (Loss of Serial Communication with VTD)
1989 Pontiac Bonneville LE 3.8L Exhaust VIN: 1G2HX54C9K
Hello Guys and girls I have this car here from another shop after they could not figure the problem they handed it to me . It was taken to them because of the catalitic glowing cherry red. Plus also the exhause manifolds get to glow red.I have checked all th...
1994 Pontiac Firebird Formula 5.7L No Start VIN: 2G2FV22P2R
no start condition: good spark, good fuel pressure but has random injector fire. ignition scope pattern shows good spark line fire to all 8 cyls. injectors have constent power but looses ground signal at times but randomly. one injector will fire and then not ...

Fixes & Summaries for GM
Fix/Summary Answers
2001 Cadillac DeVille DHS 4.6L class 2 data VIN: 1G6KE57YX1
Thanks for all the response. I must admit the way this vehicle was acting threw me one but it ended up being two problems. First, the ipc connector was not fully seated and then, the ipm was shorted, that was why my tech 2 kept flashing all of its data. reconn...
1995 Chevrolet S10 LS 4.3L Excessive Emissions VIN: 1GCCT19Z9S
The customer took the car, so there isn't a repair to list. Here is some aditional info. The truck is going into closed loop, the O2 sensors have a very quick responce. The cts reads ok.One thing that was interesting was that when the tan bypass connector was ...
2000 Chevrolet Silverado 2500 6.0L ABS Activation VIN: 1GCGK2946Y
Well got in deep on this one. Cleaned surfaces for WSS sensors then replaced both hub and sensor assemblies. Same problem. Could not afford to fix this one ...
2000 Chevrolet S10 4.3L 4 wheel drive VIN: 1GCCT19W1Y
Thanks for all of your suggestions. This vehicle was repaired with a new switch which was the overwhelming tip, and whta we thought i was to begin with. Thanks again.
2000 Chevrolet Impala 3.8L Cuts out, Stall VIN: 2G1WF55K9Y
Sorry about waiting so long. After pulling the ignition switch out of the dash to check voltages, the car never duplicated the symptoms again. Did not see any visual signs of problem with ignition switch (no heat discoloration or burned terminals). But since t...
2001 Chevrolet Tahoe 5.3L whistling noise VIN: 1GNEC13T61
customer took vehicle,than brought it back,because the noise got louder,upon return,I could clearly hear the noise coming from the PCV valve,must have had a weak spring,or something restricting the vac. flow to the valve, i installed a new valve and the noise ...
2001 Chevrolet Impala 3.4L low coolant level sensor VIN: 2G1WF52E21
Thanks to all who replied, but we still have not heard back from the customer. I do not know if the vehicle will return anytime soon. If it does come back, I will be sure to post any information related to the repair.
1997 Geo Tracker 1.6L MIL Lamp on VIN: 2CNBJ186XV
Thanks guys...everyone (that actually understood my request) said restricted passages at throttle body...some even gave great advice on how to clean. Trouble codes: P0400.
2003 GMC C5500 Topkick C5E042 6.6L engine VIN: 1GDE5D1113
Thank You to all who replied.When talking to a couple of GM Techs they felt the engine should still be under warranty so I called the GM 800 number in the owners manual.The coverage was 5yrs or 160000 km.The vehicle was sent to the dealership.The dealer replac...
1962 Oldsmobile 98 394CID vacuum harness
I received 3 responses to this post. A very helpful guy by the name of Chris [...] had the item needed. He e-mailed the 1961 heater diagram for the vacuum circuits. Seems the 1962 Olds uses the 1961 manual with a 1962 supliment. This info was found in the 1...
1997 Oldsmobile Achieva S 2.4L Hesitation, Misfire VIN: 1G3NL52T7V
Thanks again. Turned out to be the pcm as suspected. Never saw one fail in that manner before. Had good powers and grounds to the pcm when the problem occured. Could not think of anything else it could be. Problem fixed.
1996 Pontiac Grand Am SE 2.4L MIL Lamp on VIN: 1G2NE52T4T
reflashed pcm and explain to the customer that if the code came back pcm will have to be replaced. Trouble codes: P0600.
2000 Pontiac Grand Prix GT 3.8L Poor Idle Quality VIN: 1G2WP52K3Y
In the end we replaced throttle cable and lube linkage, called customer and he said it was fine. The old cable did not feel very bad, but I do thik it was the fix. Something so easy))) thanks for you replys
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