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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for October 11, 2010
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
1998 Buick Park Avenue 3.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G4CW52K4W
Thanks in advance guys, I'm an import guy, GM's are new to me. It was towed in, no start. Codes P0172 Bank 1 rich and P0300 Random misfire. The front bank was fuel fouled. After drying off and adding oil it started. Now has a misfire on #3 all the time and int... Trouble codes: P0172, P0300
2004 Buick Park Avenue Ultra 3.8L 2-1 coast down shift VIN: 1G4CU54164
The 2-1 coast down shift is brutal in the morning, seems to get better when tranny temp is above 160f. Scan with Tech 2 no codes all sensors within specs. In the last 3 mph of coast down the EPC amperage drops to .12 and pressure increases to 190-210 psi and 2...
1990 Chevrolet Lumina 3.1L Surge VIN: 2G1WL14T3M
a customer drop the car off and said he had a friend do a headgasket job and then it did not run so i looked at it and found plug wires crossed and i replaced map sensor what it does now is hunts badly at idle and if reved up it runs ok put it in gear and it t... Trouble codes: 33 (map sensor)
1995 Chevrolet motorhome 6.5L altenator VIN: 1GBLP37F4S
This one is driving me crazy!! Third Alt replacement. test good on bench. CS-130 amp hooked up to a sure power voltage isolator. replaced that too! batt terminal to battery B+ good when ignition on. sens wire to b+ terminal good. f terminal 12.6 volts to alt. ...
1999 Chevrolet S10 LS 4.3L Atc VIN: 1GCDT19X8X
I have this s 10 in with the complaint of low brake pedal and ABS activation. While combing through Tech 2 data, I noticed that the 4wd PID always shows that 4wd hi is enabled. The 4wd system works fine as far as commanding in on into 2wd, 4 hi and 4 low, but ...
1999 Chevrolet P30 7.4L No Start
hello chevy truck motor home techs have a 32 foot 454 chev. work hourse motor home it would not start customer stuck in a camp ground went to check it out had no fuel pump buzz hit tank started right up orderd a new fuel pump from chevrolet [work hourse] when ...
2000 Chevrolet Express 2500 5.0L Poor Idle Quality, Hesitation, Surge, Misfire, MIL Lamp on
i have a 2000 chevy express 2500 with 5.0l. This van came in with service engine soon light on. Codes were p0300 and p0306. The plugs, wires, cap, rotor, were replaced. Checking misfire data on my scan tool afterwards cyl. 6 still would misfire when van ran un... Trouble codes: P0300, P0306
2002 Chevrolet Impala 3.8L Rack and Pinion VIN: 2G1WH55K02
Tis vehicle has a loud popping noise coming from the front when the wheels are turned in either direction and vehicle is moving. I shaft was replaced to correct the clunk coming from that. Rack and pinion was replace twice to fix this loud pop. Replacing the r...
2002 Chevrolet Express 2500 6.5L Surge VIN: 1GCGG25F82
This 6.5 has a complaint of a surge especially on a long down hill decell.i have not experienced it to the degree that the customer states he does. I have graphed scan data to watch the app and the koeo pids are spot on with no drop outs but io do see that the... Trouble codes: N0NE
1968 Pontiac Firebird 5.7L Front end, filler panel assembly VIN: 223378L110
Hi Everyone, first time posting and it's for a friend. Looking for some diagrams or pictures and breakdowns to help with restoration and assembly on the front end, bumper, filler panels, etc for this Pontiac, it arrived in this country dismantled and is being ...
1994 Pontiac Grand Am SE 2.3L Cuts out, Stall, Poor Fuel Economy VIN: 1G2NE5533R
Here's the break down, I recently replaced the headgasket on this 1994 Pontiac Grand Am with the 2.3L SOHC quad four engine in it. Car ran completely fine for a few weeks. Now during acceleration the vehicle will not shift unless you let off on the gas, it wil...
2000 Pontiac Bonneville SE 3.8L No Start, Stall VIN: 1G2HX54K3Y
vehicle came in with a low rpm stall. i have only had the problem happen when the vehicle is idling cold. It just dies as if you shut the ignition off. Then it is starts and dies until you cyle the ignition but has spark and fuel. Engine dies so ubruptly i can...
2004 Pontiac Grand Prix GT1 3.8L MIL Lamp on VIN: 2G2WP52284
Pontiac came in for inspection with MIL lit, code for evap flow during non purge. 1st thing I did was to use genisys to operate vent control solenoid. Heard no click so I thought I had an easy fix. Problem is a lack of ground at the connector. I have power, bu... Trouble codes: P0496
2005 Saturn Relay-2 3.5L MIL Lamp on VIN: 5GZDV03L75
keeps setting egr code. we replaced with the updated valve and harness w/pipe and sent to dealer for PCM calibration but still sets egr code. i checked ports when replacing the valve and it is clear. double checked wiring and i think i got the wiring correct a... Trouble codes: P0404, P1404

Fixes & Summaries for GM
Fix/Summary Answers
1991 Chevrolet C2500 Silverado 6.2L 3-4 shift VIN: 1GBHR33J5M
I got the tps voltage adjusted and the vehicle starts good now. I don't do much trans. work here so the customer is going to the trans. shop to get his shifting problem repaired. I thought that the tps adjustment would make the trans shift problem, but it ev...
1998 Chevrolet Astro 4.3L Mechanical VIN: 1GBDM19W6W
hi evry one i have replace the spark plugs with a hoter spark plugs and perform a decarbon, and problem solve, thanks all of you.
2000 Chevrolet Express 2500 4.3L Starting VIN: 1GCFG25W4Y
I"d like to thank every one that replyed to my help. and a special thanks to gordon from washington he was right about the harmonic balencer somethink simple that i over looked thanks again all iatn members.
2006 GMC Canyon SL 2.8L MIL Lamp on VIN: 1GTCS14826
Truck went to dealer for repairs. They said Actuater and timing chain. Trouble codes: P0017.
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