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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for August 4, 2010
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
1998 Buick Century Custom 3.1L Poor Fuel Economy VIN: 2G4WS52M4W
car gets about 16 mpg. vehickle runs like it has a bad cat under heavy acceleration. stft at idle is -10 TO -20 ltft is the same and gets worse when driven. map value at idle is 39 kpa and at cruise is 46kpa. map volts is 1.21 at idle and changes normally unde...
2001 Buick Century Custom 3.1L Park Mechanism VIN: 2G4WS52J01
Just to start things off, thanks to anyone with an idea for me. So this beautiful piece of engineering(sorry long day kind of sarcastic) has been regularly serviced in our shop its whole life. Two weeks ago cust. Brings car in and wipers are parking on the win...
1995 Cadillac DeVille 4.9L Driver Info. Center VIN: 1G6KD52B8S
Would appreciate some help troubleshooting code io32 . Our data system has no information on this code. Any help on diagnosing this code would be helpful.thank you ...
2000 Cadillac Catera 3.0L MIL Lamp on VIN: W06VR54R7Y
this car has the codes listed and you can not feel a misfire i do know that the maf and the coil pack were replaced along with the sparkplugs(found repair invoice in seat) scanner shows history misfires but no current we cleared light and drove several times o... Trouble codes: P0300, P0301, P0303, P00, 305 (Misfire cylinder 5)
1987 Chevrolet R10 Silverado 5.0L Poor Idle Quality, Stall VIN: 1GCEV14H7H
Thanks for your help, this truck came from other shops. I have repaired TB and install new injectors. It also has 2 new AC Delco fuel pumps, new filter and new lines. I have replaced distributor with reman. Checked coolant temp, MAP, installed new O2 sensor af...
1990 Chevrolet Corvette 5.7L battery VIN: 1G1YY3386L
First time posting so bare with me.Car would not start after sitting for 10 days. our road service tried to jump car off and it would not turn over. Installed new battery and vehicle started. Tested old battery and it was stone cold dead. Tried to charge the o...
1994 Chevrolet K1500 5.7L speedometer, tachometer VIN: 2BEK19K9R1
hello. This truck has a speedometer that jumps back and forth, sometimes stays still. At the same time the tachometer bounces and reads innaccurately. After checking continuity of VSS wires(good), replacing vehicle speed sensor, replacing guage cluster,verify...
1996 Chevrolet Cavalier 2.2L Abs Motor Pack VIN: 1G1JC1245T
I cant find a ets button in the car??, mabe shifter was replaced dont know??? the brake do not drag and are in correct operation. I think the motor pack has a problem but not sure??how ever there are no codes even when the light comes on? there is an evap code...
1996 Chevrolet Corsica 3.1L #1 Fuse VIN: 1G1LD55M0T
Vehicle Inter. blows #1 fuse in the dash fuse box for comp. command control and engine cuts out and won't restart replace the fuse and engine starts and runs. We have driven the car and can't get fuse to blow but when we give it back to cust. car is towed in t...
1998 Chevrolet Blazer 4.3L transmission VIN: 1GNDT13W2W
I have this blazer here from another garage. It sets a MIL light with code p0753. Just that NO other codes. Transmission shifts fine. They told me that they have replaced all the solenoids. Road testing the vehicle it shifts and drive normally. All upshifts an...
1999 Chevrolet Corvette 5.7L Excessive Emissions, MIL Lamp on VIN: 1G1YY32G8X
Thanks for reading. I have a 99 vette with an air injection issue. Origanally the car came in with p1415-air system fault bank 1. Being that this was the easy check valve we pulled it out and it was rusty and was hard to blow through. Replaced vavle and ran pu... Trouble codes: P0410 (Secondary air injection system fault), P1415 (Air system fault bank 1), P1416 (Air system fault bank 2)
2000 Chevrolet Blazer LS 4.3L Ac Pressure VIN: 1GNCT18W4Y
Truck came in blowing warm high pressure high and low sides. Tore down and found alot of metal at orifice. Installed new ac system as described in repair history. Now vehicle wont cool at idle. Blows 41 degrees going down the road. Blows 60 if revved to 2500 r...
2000 Chevrolet Monte Carlo LS 3.4L Accessories VIN: 2G1WW12E4Y
Hi Guys , I got this 2000 Chevy Monte-carlo driving me crazy, car came in & the complaint is the fob dont work, you can lock the car with the key & the horn sounds all the locks working fine manually , but when you try lock it or unlock it with the fob it wont...
2001 Chevrolet Express 3500 5.7L Poor Idle Quality VIN: 1GCHG35RX1
Hello, i have this 01 5.7 express van that is giving me a major head ache, originally came in for barley running concern and stalling. Found code p0355 for crank sensor, ran through flow chart for diagnosing concern and all tested ok except jumping between 12 ...
2003 Chevrolet Silverado 3500 6.0L Power Take Off VIN: 1GBJK34U93
Have a help request of a different sort. The vehicle is 2003 Silverado 3500 cab/chassis made into a tow truck. The early 2003 6.OL were produced prior to the provision of adding on an accessory PTO for external drive-by-wire throttle control. Many attempts hav...
2001 GMC Sonoma SL 4.3L No Start VIN: 1GTCS19W41
Hello All, Daughter just bought this truck and fuel pressure is 65 psi all day long, no bleed down worth speaking about. Spark is present, upper intake removed no fuel droplets or raw smell. On 1st start I have to hit it with carb cleaner and it starts righ...
2005 GMC Safari 4.3L MIL Lamp on VIN: 1233456789
i have a van here were the gas guage fluctuates. we installed a new fuel pump thinking the old one went bad. NO GO!!! does the cluster usually go bad on these thing or is there any good tests i can do to fix this problem Trouble codes: P0462
2001 Pontiac Aztek 3.4L evap, trans VIN: 3G7DA03E31
This one has me scratching my head. I have 2 codes a P0440 evap system fault and also a P1181 delayed shift. The gas cap tested taulty so I replaced but evap code still comes up. I will be smoke testing evap system this morning but am a little confused as the ...
2002 Saturn Vue 3.0L Cuts out, MIL Lamp on VIN: 5GZCZ63B42
This car will reset these codes every week to 10 days. The customer says that when it happens the engine jerks and the MIL comes on. It does not stall or has any pattern to it. Then it runs fine but the MIL is on. It is always the same set of codes. When I tes... Trouble codes: P0121 (Throttle posistion sensor 1 performance), P0171 (Fuel trim system lean Bank 1), P0174 (Fuel trim system lean Bank 2), P0700 (Trans control module requested MIL), P2135 (Throttle position sensor 1-2 correlation), P1779 (Torque delivered signal)
2002 Saturn SC1 1.9L MIL Lamp on VIN: 1G8ZK52722
Vehicle needed state inspection had check engine light on,scanned for codes P0446 and about 4 others.Got all others codes to clear with help of IATN.Cannot get P0446 to clear.Data for fuel tank pressure reads 0 volts and -7.50" vaccum.One would think easy fix,... Trouble codes: P0446 (Evap Vent Solenoid Valve Control System)

Fixes & Summaries for GM
Fix/Summary Answers
2002 Cadillac DeVille 4.6L Surge VIN: 1G6KD57Y92
Thanks for all the responses. The majority of the replies all said the same thing. Get the latest flash software in the computer. I called the customer and passed that information along to him and he is headed out to the local dealer for a reflash. The consens...
2001 Chevrolet Silverado 2500 6.0L MIL Lamp on VIN: 1GCGK29U71
2005 Chevrolet Suburban 1500 LT 5.3L Vses VIN: 1GNFK16Z95
Sorry this has taken so long to post. Customer does not want to repair at this time. Replies "replace the bpmv and if that does not fix it replace the ebcm". "Updated program for the EBCM and also an updated Yaw rate sensor (TSB 05-05-25-003B)". "Be sure the b...
1998 Pontiac Sunfire SE 2.4L Misfire, MIL Lamp on VIN: 4G2JB32T3W
Thank you to all that replied. I am in total agreement that there is a valve issue, but unfortunately the customer declined cylinder head removal at this time. Trouble codes: P0303 (Cylinder 3 missfire).
2003 Pontiac Grand Am SE 3.4L No Start VIN: 1G2NF52E23
hey guys,,thanx for the input.. pay attention very simple ,was not going to close until tested,fixed the day of post.INTERMITTENT NO START,clear code,perform relearn,start vehicle,with vehicle RUNNING remove lock cylinder and key,move vehicle connector so that... Trouble codes: B2960 (incorrect VTD input).
2005 Saturn Vue 2.2L Stall VIN: 5GZCZ33D45
It only died at an idle when coming up to a stop light. I checked the battery and voltage and belt routing what I ended up doing is cleaning the throttle body and that seemed to make it not stall and the idle would come up about 100 rpm when the a/c was kicked...
2005 Saturn Ion-1 2.2L Stall VIN: 1G8A152F65
This vehicle is fixed. After monitoring all data related to engine idle and finding nothing out of range, we removed trans to recheck everything and possible replace converter. While removing the trans the R&R tech noticed that a plug was put into the cooler l...
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