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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for August 27, 2009
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Open Help Requests for GM
Help Request Answers
1994 Buick Park Avenue 3.8L Surge, Stall VIN: 1G4CW52L3R
Dear IATN Techs, Got this stumper here. Customer came in our shop complaining his wife drives the car to work, would get one block away from home, car would surge, stall, and restart right away. Got the car in, drove many times. Did get to act up once. Checke... Trouble codes: P0705 (Transmission Range Switch)
1997 Buick Park Avenue 3.8L oil level sensor VIN: 1G4CW52K8V
Vehical has digital read out on dash for oil pressure and level. When scanning engine computer,the low oil sensor always read low, even though system is full. So i changed low level switch when doing oil change. Now when starting car the check oil level info c...
1984 Cadillac Eldorado 4.1L battery lite VIN: 1G6AL5784E
INSIDE BATTERY LITE AT DASH INOP AND I JUMPED #1 brown wire and alternator charges ok. need to find where brown sensing wire winds up at in dash?
2003 Cadillac Escalade ESV 6.0L 1-2 shift VIN: 3GYFK66N83
customer brought in with mil on. says no shift problems. said the dealer gave him code of po753 so he says he replaced both the a and b solenoid after trans pan removal.had same problem. we scan and get same po753. if clear, it will reset everytime during seco...
1984 Chevrolet Corvette 5.7L Kick back on decceleration VIN: 1G1AY0788E
I actually have two problems, the first pertains to the drive shaft on the 4+3 overdrive transmission Corvettes. They came from the factory with a small two piece(separated by rubber)harmonic balancer on the slip yoke. Eventually those harmonic balancers fail ...
1993 Chevrolet S10 4.3L Unknown VIN: 1G1FP234ZD
car came in with Brake light flashing 3 short and one l long. The car has RWAL brake system without vcm. I am think the code is 31 because three short and 1 long flash when key in on position. In AllData, no code 31 for RWAL but 4 wheel ABS system. The code ta...
1995 Chevrolet C2500 Silverado 6.5L High Oil Pressure VIN: 1GCGC29FOS
Hi I just replaced the injector pump on this truck and it came back complaining of unusually high oil pressure. The truck runs great and sounds normal but the oil pressure gauge reads 60 at idle and 80 on the highway. I changed the sender and oil filter with n...
1997 Chevrolet Blazer LS 4.3L Poor Idle Quality, Surge, Stall VIN: 1GNCS13W9V
I have a97 blazer 4.3l vortec and when the truck first came in it had no gas gauge reading and code p0462 was a hard code i traced the wires and found that it has power going into the sending unit but none coming out so i figured that it was the usual sending ... Trouble codes: P0462
1999 Chevrolet Silverado 1500 4.8L start & stall VIN: 1GCEC14V4X
Hello all and thanx in advance. I have this 99 silverado with an anti-theft issue. The problem is that it will not enter into a re-learn. It isnt setting any codes either. I have replaced the lock cyl. It is a start and stall symptom but the security indicator...
2001 Chevrolet Venture LS 3.4L cyl#1 VIN: 1GNDX13E01
I hope someone has seen this before! its got us stumped! thanks in advance! This is my first post in years, maybe we have been lucky. This vehicle came in with the typical intake leaking coolant, due to the low miles, we did the intake, of course it pumped com...
2001 Chevrolet Silverado 2500 HD 6.0L Misfire, MIL Lamp on VIN: 1GCHK23U21
First, thanks for your help in advance. We replaced the engine in a 2001 Chev 2500hd 6.0 w/a used engine(54k miles--truck has 244k)-the engine came from a 05/06 truck. The old engine had a missfire before but we didn't check it due to oil pressure problems and... Trouble codes: P0300 (engine missfire detected)
2003 Chevrolet Tahoe LS 5.3L change oil lite VIN: 1GNEK13T11
Hey everyone,i have a customers tahoe in here for some unrelated work. He had asked me if i could reset the change engine oil light. The dealers i talked to just told me that if it doesnt reset on the first couple of tries just try a few more times. I have not...
2005 Chevrolet Silverado 1500 4.3L wont set evapmonitor VIN: 1GCEC14X65
Weve replaced these parts on it to begin with and now when we do the drive cycle it wont set the evap monitor ready it sets all the other monitors but the evap is the only one that doesnt set. We have done the drive cycle many times and we still cant get it re...
1998 GMC Jimmy SL 4.3L Excessive Emissions, Poor Idle Quality, Stall, MIL Lamp on VIN: 1GKDT13W9W
replaced leaking ex.y pipe and right [...] , had a rough idle , now it has a rough idle and sets a code p0174b lean exhaust bank 2 , the 02 sensor is black , the long term fuel trim is trying to richen bank 2 by up to 25% while bank 1 remain at 0% or minus ...
2000 GMC K2500 Sierra SL 5.7L Wide open throttle VIN: 1GTGK24R5Y
I need some help PLEASE... Truck came in for hessitation. Verified condition. It seems that if the throttle is pressed lightly that you can bring the truck up to red line just fine. But the second you give it half or more throttle it starts chocking, pitted, a...
2007 GMC Acadia SLT 3.6L MIL Lamp on, traction control off VIN: 1GKER3357J
Hello Techs, Thanks for reading. We have this vehicle in the shop for a second time in two weeks. Originally we repaired a P0442 dtc for evao emmisions small leak. This involved removing the fuel tank and replaceing the evap vent solenoid. We returned the vehi... Trouble codes: P0171 (lean bank 1), P0174 (lean bank 2), P0496 (excessive evap flow)
1995 Oldsmobile 88 Royale LSS 3.8L Poor Idle Quality, Stall, Misfire VIN: 1G3H45216S
I have no injector pulse on #6.He has been having trouble with misfire on occassion. when it does the key chime dings once.He has had this problem for about 6mo.About 2 weeks ago he had a trans issue and they installed a new computer.Does anyone know how or if...
1994 Pontiac Bonneville SE 3.8L Hesitation, Surge, Cuts out VIN: 1G2HX52L1R
the vech will buck under hard accel 2500 rpm and up but will not rev up over 4000.feels like ign is cutting off and on, almost like fuel related but recovers instantly plus pressure and volume tests fine, will recover instantly after letting off pedal. mild ac... Trouble codes: 42 (cam sensor fault), 43 (crank sensor fault)
2004 Saturn Vue 3.5L torque converter VIN: 5GZCZ53484
read a post for this same problem and the fix was a torque converter and pcm flash per tsb. i've looked in ondemand and do not see this tsb. any one know the specific tsb# and the content of the bulletin? thanks in advance.

Fixes & Summaries for GM
Fix/Summary Answers
1997 Cadillac Eldorado 4.6L detonation VIN: 1G6EL12Y7V
Just to let you guys know I am still pulling my hair out on this vehicle. I have tested and replaced the knock sensor. I have replaced the intake gaskets. I replaced the spark knock module. I have replaced the ECM. I have checked the circuit between the kn...
1991 Chevrolet Lumina 3.1L No Start VIN: 2G1WL54T6M
thank you all it turned out to be a blown fuse and defective after market module thanks again. the fuse was the power feed to the injectors
1992 Chevrolet Camaro Z28 5.0L Safety VIN: 1G1FP23F2N
we tested the air bag mod and found it to be shorted out we replaced it with a junk yard one because car was not worth putting a new onw in . Thanks to all who replied
1995 Chevrolet Camaro 3.4L oil pump drive VIN: 2G1FP22S1S
vehicle is fixed. removed wiper arms and cowling which provided just enough clearance. thx for the replies which actually addressed the clearance issue on this vehicle.
1998 Chevrolet C3500 Cheyenne 7.4L No Start, Poor Idle Quality VIN: 1GCGC34JWE
I'm not really sure what fixed this one !! Dont you just love this job. We cleaned the MAF (again), tightened the terminals on the MAP and soldered a new eyelet on for the PCM ground on the thermostat housing. The vehicle is running great IAC counts are now ar...
2001 Chevrolet Blazer LT 4.3L Surge VIN: 1GNDT13W7I
thanks again for all the help i received.it did turn out to be a tcc problem. before my next journey i did check coolant and iat sensors they were reading ok. took vehicle for a good ride, about 25 miles no problems. went back to shop and rechecked tune up and...
2003 Chevrolet SSR 5.3L loss of coolant VIN: 1GCES14P73
well it should be fixed.thanks for all responses.it seems that the expansion bottle neck where the cap seals with an oring is distorted and not a good enough seal.that was where it was losing coolant originaly.was the only part not replaced the first time of c...
2004 Chevrolet Malibu 2.2L valve trane
Thanks guys for your help this is what i did to fix this. I pulled the head pulled the plugs in the back of the head and flushed all oil passages and i found no blockage of anykind so i pulled out that small oil restricting plug in the bottom of the head it ha...
2006 Chevrolet Silverado 2500 HD LT 6.6L crank time VIN: 1GCHK29D46
Fellow Techs, This one is fixed. Recently installed OE fuel filter was the problem. Replies included: check fuel press., supply side vacuum, ECT, fuel leaks, glow plugs, glow plug relay, scan engine, injectors. Thanks very much.
2000 GMC Sierra 1500 SLE 5.3L No Start VIN: 1GTEK19TXY
Thank you everyone for the good info. I did some more testing and checking. The Passlock sensor voltage never changed from 5 volts, as it should drop below 5 volts during cranking. Replaced the sensor case and the ignition switch, did the 30 min re-learn and ...
2002 GMC Savana 3500 5.7L No Start VIN: 2G1WL52M8V
Well after a week of waiting for my local GM dealership to come to my shop with their Tech 2, we fixed this one. We started by disconnecting the airbag module, which let us communicate. Then we tried to do the theft or security relearn, multiple times to no av...
2002 Oldsmobile Bravada 4.2L cooling fan VIN: 1GHDT13S92
thanks to all who replied and especially micheal. we looked in to the tsb and found the information about the wiring harness. since this clutch was replaced relatively recently we opted to replace the wiring harness only (we did see a chafed spot in the harn...
1994 Pontiac Firebird 3.4L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Poor Fuel Economy, Can't read computer VIN: 2G2FS22S3R
After my local GM dealer And Car Quest Auto Parts informed me that the car contained NO (MAF) or (MAP) Sensor? Federated parts sold me a MAF sensor and once it was replaced the car ran like a top. No problems at all. As for the computer not conecting to any co... Trouble codes: 012 (Code reader wont connect to computer at all.), 000 (Snap On couldnt make any connection).
2001 Pontiac Aztek 3.4L Surge VIN: 3G7DA03E21
Thanks guys for all your input. Most of you had it right when you suspected the TPS. I watched as I was driving (and it finally acted up while in my possession) and the TPS did not rest at zero with zero throttle. I do not recall seeing this the first time ...
2001 Pontiac Bonneville SE 3.8L Cuts out, STARTER WILL STAY EN VIN: 1G22HX54K8
Well after driving many,many miles I finally figured it out. To start with as my update stated the starter drive was bad and getting stuck . it was just a wierd luck that it happened at the same time . After replacing the starter drove home about 15 miles and ...
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