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Prev Professional Automotive Repair Technical Discussions for July 31, 2006
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Open Help Requests for GM
Help Request Answers
1990 Buick Electra Park Avenue 3.8L Hesitation, Stall, MIL Lamp on VIN: 1G4CW54C6L
Car stalls and dies after a short run, will restart and run fine at times. Sometimes SES light comes on and still runs good. Checked wave form of MAF looked the same as test pattern. Checked for broken wires at MAF and at the harness between engine and firewal... Trouble codes: 34 (MAF Sensor low)
1999 Buick Century Limited 3.1L svs,abs,traction off VIN: 2G4WY52M5X
svs,abs, and traction off lights set as soon as shifter is moved into gear from park or neutral. happens all the time. shut vehicle off and restart. lights are off and codes are not currently present until shifter is moved into gear. code 1233 rf short or open...
1989 Cadillac Eldorado 4.5L ignition VIN: 1G6EL1159K
we were atemting to reset the oil change time and some how dissabled the ignition system says dissabled because of security system. Cad. says thats imposible that there is a problem with the ignition tumbler or pass key system. I have checked the ohms on the k...
1994 Chevrolet C2500 6.5L engine VIN: 1GCFC24S4R
truck came in no start. found no fuel getting to injectors. replaced fuel injection pump. still no start. check glow plugs- good. found fuel had strange smell. drained fuel and replace filter. has good fuel supply to injection pump and is suppying fuel to inje...
1994 Chevrolet Lumina APV 3.8L No Start VIN: 1GNDU0615R
hi,everyone i have a 94 lumina apv that i can't pull codes the dl conector under dash i believe is not for engine testing. i believe there is a obd connector some were in these vehicle but not sure were according to hood sticher it ca. cirtified & obd equipped...
1995 Chevrolet Cavalier 2.2L Ignition switch VIN: 1G1JC524XS
Hello gm techs. Need some info. This is my car and the ign. switch lock cly. needs to be replaced. This car uses a 1st ans 2nd design lock cly. mine being the 2nd design costing me 201.00 as compared to the 1st desing costing 38.00. does any one know if there ...
1996 Chevrolet Astro 4.3L Misfire, MIL Lamp on VIN: 1GNDM19W6T
4.3 litre chevrolet miss fire only at idle number 3 and 5 cylinders bring the idle up just a little smoothes out. miss fire goes away? any help out there? please! Trouble codes: P0300 (random misfire)
1998 Chevrolet Malibu 2.4L water pump VIN: 1G1ND52T9W
we just had a pc melt down and lost our all data..our question is: is the timing cover removed to get access to the water pump for it's replacement..just can't remember for certain..also trying american and metric sockets are a real loose fit..is there a speci...
2000 Chevrolet Malibu LS 3.1L turn signal VIN: 1G1NE52J1Y
We have this 2000 Malibu that customer complains of an intermittent problem with turn signals. Sometimes the turn signals keep "clicking" even after the signal and switch cancels itself. Lights on dash and exterior quit flashing but the clicking continues. the...
2000 Chevrolet Silverado 1500 4.8L Temp Door Motor VIN: 1GCEK14V0Y
Hi Everyone, the problem with this truck is that the heater temperature door doesn't move from hot to cold without first turning the blower off. I removed the motor and operated it while disconnected from the door shaft and it works ok. I worked the temp door ...
2004 GMC Savana 2500 4.8L wheel speed VIN: 1GTGG25V54
i have tis 2004 gmc 2500 van, the left front wheel speed sensor drops and spikes when looking at it with the modis on graphing mode. so i first cleaned the rust off the sensor mounting area, then i replaced the sensor neither did anything at all, so then i swi...
1994 Oldsmobile 88 Royale 3.8L Poor Idle Quality, Cuts out, Stall VIN: 1G3HN52L9R
greetings, this Olds is driving us crazy. car will run rough & stall intermitently, fuel pressure drops of from 35-40lbs to 5-10 lbs. New pump was installed, connections all look ok, ground tree at drivers kick is clean & good. Problem will actually go away & ...
1999 Oldsmobile Intrigue GL 3.5L battery light VIN: 1G3WS52HXX
this vehicle came in with a bad alternator. checked the charging system and found a very weak battery replaced the alernator and battery.after dooing so the battery light came on after about 1 minute after the engine was started.charging voltage was at 13.9 vo...
1999 Oldsmobile Aurora 4.0L headlights VIN: 1G3GR62C6X
help old's techs can not find this problem! the module relays click on and off on there own sometimes. they also work fine sometimes. it seems to be more when the car gets hotter but not all the time. i am leaning towards the ignition switch unless someone kn...
1987 Pontiac Firebird 5.7L Hesitation VIN: 1G2FS2184H
HELP! This firebird blows black smoke from the tailpipe on acceleration. Vehicle had PROM error code. ECM and PROM both replaced. EGR valve, fuel pressure regulator, and upper intake gaskets replaced. Plugs, wires, and distributor replaced. Checked catalytic c... Trouble codes: 45 (Rich Exhaust)
1993 Pontiac Grand Prix SE 3.1L Hesitation, Misfire, MIL Lamp on VIN: 1G2WH51T7P
Hi everyone, This vehicle will at times buck while it's driven. It's never to the point of quitting all together, not yet anyways. The customer once drove it for 2 weeks with no problems, and at other times it's terrible. My biggest problem fixing this vehicle... Trouble codes: 35 (51), 43 (Etc...), 53 (36 -), 36 (42 -), 42 (15 -), 15
2001 Pontiac Aztek 3.4L differential? VIN: 3G7DB03E91
Seems when putting transmission in reverse it really clunks bad. The noise seems to be coming out of the rear diff. but the fluid is full and clean. There is a bulletin regarding to high a idle and having ecm reflashed? but it sounds to us like a gear slop? an...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick LeSabre Custom 3.8L Poor Idle Quality VIN: 1G4HP52K1V
Hey guys thanks for all your help. We tried every ideas that you gave us, but we still have not found the solution. When the car comes back were going to take out the converter bolts and see if we still have the running condition. Thanks for all the help. Mi...
1974 Chevrolet Corvette 5.7L hydralic
Sorry for the delay,the customer took the car for the july fourth weekend and did not bring it back untill recently. In the mean time research revealed that his corvette specialist sold him the wrong booster, I proved it to him and told him we must first put t...
2000 Chevrolet Silverado 1500 4.8L No Start, Hesitation, Surge VIN: 2GCEC19V5Y
Finally got this one fixed, and as a few stated I did have 2 problems. As I said before this truck never acted up in my garage so it was very hard to diagnose. I failed to mention (because I forgot it had been a few months) that the fuel pump connector and the...
2002 Chevrolet Blazer LS 4.3L heater core VIN: 1GNCS13W32
I finally fixed this S10 by back flushing the heater core and also performing an engine flush too. I dont hear any gurgling noise from the heater core anymore! Thanks for all the help Jeff
2001 GMC Yukon Denali 6.0L Misfire, MIL Lamp on VIN: 1GKEK63U71
What I found in the rails was heavily presnt in the fuel filter and it looks like its source is from the fuel tank. Customer only wanted the filter changed and lines and rails flushed, also cleaned the inlet side of the injectors. Ran fine after this, no more ... Trouble codes: P0300.
1995 Pontiac Bonneville SE 3.8L P/Steering Pump VIN: 1G2HX52K4S
Thanks to everyone that responded.I decided to replace the power steering pump again,i replaced the pump with a non variable assist and the noise was gone as soon as i started.I did not figure out the connection with the variable assist valving and the noise,p...
2000 Saturn LS2 3.0L Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on, Lack of Power VIN: 1G8JW52R9Y
Well, it's fixed! It ended up being a faulty MAF sensor. Thanks especially to Ray from California. Although I should have thought of it myself, he suggested unplugging the MAF and seeing if an immediate improvement was noticed. Indeed there was. I replaced the... 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).
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