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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 22, 2010
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Open Help Requests for GM
Help Request Answers
1994 Buick Park Avenue 3.8L Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: 1G4CW52LXR
Hi guys. I have this little Buick here that came in with codes 321 and 361. I diagenosed as a bad ecm. I check IATN archives and found the same fix by other members so no brainer right. Got ecm (Standard brand), and put it in. At startup it stumbled, surged, s... Trouble codes: P0341
1995 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP52L8S
This Buick initially came to me as an intermittent no start with the customer refusing to go back to the last shop who replaced the computer for an undisclosed reason. They've been a great customer to me. The symptom I noticed every time when the car would no... Trouble codes: P0118 (Engine Coolant Temp Too High)
1996 Buick Skylark Custom 2.4L Timing Shain VIN: IG4NJ52T6T
Vehicle brought in for timing chain components diaged at other shop for rattling noise. My writer asked if they would like me to give anothe opinion and they said just do the job they had asked for. And i did, and the noise is still there to some extent. Custo...
2004 Cadillac DeVille 4.6L Left Rear Window VIN: 1G6KD54Y24
hello everyone. i'm not real versed in cadillacs and dont work on many of them. having a problem with the left rear window on this 04 Deville. this is a used car that my manager wants me to fix for the used car lot. problem is that the left rear window was ino...
2005 Cadillac STS 3.6L Charging VIN: 1G6DW67735
Helo it's me again havent bean hear for awile iv got a 05 cadillac sts 3.6L car always ran sarted fine oneday wouldnot start so we put a new battery in fired rightup mounth latter wont start battery drained jumpstart fine tested alternator fine another new bat...
1996 Chevrolet Tahoe LT 5.7L starter VIN: 1GNEK13R6T
Customer had vehicle towed in due to a no start no crank issue...when turning key to crank,has no power at starter...relay is good but all contact points on ignition switch is always hot(constant power)any help or suggestions would be appreciated.thank you
1997 Chevrolet Express 1500 4.3L No Start, Hesitation, MIL Lamp on VIN: 1GCFG15W5V
It also had a code p0420 cat eff. It had this pile of codes in it so i cleared and po340 keeps returning i think i should get that problem first.Owner said doesn't start sometime.I put a new delphi pump in at his request back in January.of course it has starte... Trouble codes: P0101, P0102, P0143, P0171, P0300, P0340
2000 Chevrolet Astro 4.3L Sir VIN: 1GCDM19W0Y
Installed new air bag module "need Tech2 scan tool to clear b1001 code" per MOD the SDM part number needs to be programed into the BCM.Is there any other scam tools that can program this SDM part number into the BCM? I have a master tech from vetronix but I ca...
2001 Chevrolet Malibu 3.1L MIL Lamp on VIN: 1G1ND52J21
This car had a grand total of 4 cat on it, the first one was a after market and the other were walkers cats. after about 1000 miles or 3months it would eat up a cat and the o2's would be the same and it would have a code po420 The cat will not light up.No wate... Trouble codes: P0420
2001 Chevrolet Malibu LS 3.1L No Start VIN: 1G1NE52J11
Car came in for emission failure and check engine light on.Had codes p0341 and p0442.Also no start at times have to push gas pedal to get started.Replaced camshaft position sensor for cam code and gas cap for evap code.Car passed.No check engine light and no h...
2002 Chevrolet Tahoe LT 5.3L MIL Lamp on VIN: 1GNEK13Z52
vehicle came in, ce light on. initial scan found p0141 and p0161. o2 preformance low on both bank one and two down draft o2 sensors. after replacing sensors cleared codes and did test drive on cold start, first time p0141 came back. sencond drive later on both... Trouble codes: P0141, P0161
2002 Chevrolet Malibu 3.1L Drl VIN: 1G1ND52J72
Check codes and found none in pcm however it does have code in bcm (b2600). Drl malfunction. Checked relay and replaced. Check all fuses and are good. Code will clear with scan tool but returns as soon as vehicle is put in gear. Headlights do not come on autom...
2006 Chevrolet Silverado 2500 HD LS 6.0L MIL Lamp on VIN: 1GCHK24U56
We've been fighten the pickup for about a year. Any repairs we've done last for about a month and it goes into reduced power mode and sets code P2135. We've done the throttle body pigtail as per TSB. We've replaced pcm, gas pedal, tac module, and ran new wires... Trouble codes: P2135
2004 GMC Envoy SLT 4.2L shift interlock VIN: 1GKDS13S44
Upon installing the console I mashed the shifter harness (between steel console and cab) thus grounding everything and breaking pink, dark green/white and distorting light green/black, yellow and black. Repaired harness via soldering with heat shrink and tape....
2001 Saturn LW300 3.0L Timing Belt / Valves VIN: 1G8JW84R92
Hi, This car stopped running on the highway. The owner said it made a bad noise from the motor & when trying to start it the noise was worse. When I arrived it cranked over easily like it has no compression. What I would like to ask is this: My research indica...
2002 Saturn L200 2.2L The Car VIN: IG8JU54F62
The car shakes at 65-70 mph. Not there at 55 mph then goes away at 70 mph. Tried balancing tires, rotated tires, tried two different tire ( used ). Both front cv shafts, lower control arm, and preload spring as per tsb no change. Going crazy and would apprecia...
2003 Saturn Vue 2.2L Converter Lock-Up VIN: 5GZC43D53S
Transmission was not engaging and loud noise from transmission like a bad p/s pump. Transmission was rebuild and cvt fluid and additive were used, transmission burnt clutches after road test, was removed and filter was replaced and new clutches were put in new...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick Regal GS 3.8L Fuelpump VIN: 2G4WF5519Y
thanks for all your help i do believe it needed the new fuelpump now draw is 8 amps before was 9.7 but charles from new york hit it right on the head by using the paperclip i had spread the connector on the harness side of the resistor after testing voltage on...
2000 Chevrolet Silverado 1500 5.3L MIL Lamp on VIN: 1GCEK19T7Y
Thanks for all the help. I unplugged bank1 sensor 2 and plugged it into another new sensor without putting it in exhaust, just atmoshere the reading went almost to zero mv. I then punched a hole in cat, empty. I would have thought code 420 for empty cat. Insta... Trouble codes: P0137 (Bank 1 sensor 2 low voltage).
2000 Chevrolet Malibu LS 3.1L compressor clutch VIN: 1G1NE52JOY
Thanks to all of you that replied. I did notice on the first visit that the A/c pressure switch output seemed low, after rechecking the refrigerant capaity and knowing the system was full. When I manually energized tha a/c clutch, the pressures would rise and ...
2000 Chevrolet Express 1500 5.0L Misfire, MIL Lamp on VIN: 1GBFG15M7Y
Thanks guys this info helped so much. Mostly thanks to Spencer for reminding me how to check for an internal vacuum leak by checking for vacuum in the crankcase. I found 15" of vacuum at the pcv. With this info we sold the intake gasket reseal and found the ga... Trouble codes: P0300.
2003 Chevrolet Trailblazer LT 4.2L Drive-axles VIN: 1GNDT13S53
I was certain the noise on this vehicle was coming from that "extension/disconnect" housing on the rightside of the front differential, but was hesitant to rip it apart in my garage for fear it would be rendered useless for days. I recieved 8 replies, all of ...
2004 Chevrolet Silverado 3500 WT 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GBJC34U84
hi all, thanks for your replies, sorry it took so long to get back to this but mr. customer said to hold off on any more work so he can find some MONEY, finally got back to us yesterday and said he cant afford to fix it right now. I found valves are sticking i... Trouble codes: P0300.
2005 Chevrolet Cobalt 2.2L Surge, MIL Lamp on, Hard shifts VIN: 1G1AK52F35
All along I was missing very obvious information. After a long test drive, I watched as the battery voltage started dropping off. It eventually got as low as 12.1 volts and thats when I determaned the alternator was at fault. The new alernator is keeping the ... Trouble codes: U2100 (CAN communication error).
2003 GMC Savana 3500 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GTHG39U13
replaced bank 2 sensor 1 o2 sensor havent had a problem since problem had become interm. but after driveing for several days problem has not reoccured Trouble codes: P0300.
2001 Pontiac Grand Am SE 3.4L Hesitation, Surge, Misfire, Low power VIN: 1G2NF12E11
2003 Saturn Vue 2.2L no gears VIN: 5GZCZ43D03
I want to thank all those who replied, first we decided to replace the transmission with a GM remaned unit. After removed the failed unit we disassembled it to see what had happened and found the steel belt had broken, small links of this chain belt were al...
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