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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 10, 2011
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Open Help Requests for GM
Help Request Answers
2004 Cadillac Escalade ESV 6.0L Level Ride VIN: 3GYFK66N24
Hello, this Cadillac Escalade ESV reads "SERVICE RIDE CONTROL" on the dic. Scanned module & found C0660 (level control,exhaust valve circuit malfunction). Go to functional test & I can't energize exhaust valve or command the compressor on. Also, after clearing...
1996 Chevrolet Blazer LS 4.3L heater or dash VIN: 1GNDT13W1T
This truck had the head gasket leaking water very slowly.I did a compleat head job.The truck runs fine.It runs great.But inside the truck there is this gurgle sound like water moving about.The heater works great too.The AC does not work,it never did.I have thi...
1998 Chevrolet Tracker 1.6L timing connector VIN: 2CNBE1869W
The vehicle underhood label states to check the ignition timing, jump two terminals together on the timing connector. Both Mitchell and Alldata state that this connector is located by the battery, between the right strut tower and the battery. Guess what? No c...
2002 Chevrolet Cavalier 2.2L Poor Idle Quality, Surge, MIL Lamp on VIN: 1G1JC124X2
thanks for any help on this. everything in data stream looks normal except fuel injectors are being shut off and on they will go up to about 13 ms to 0 and back and forth with the idle up and down. iac has no excessive buildup of carbon. if u take the vehicle ... Trouble codes: P0507 (idle control system rpm too high)
2003 Chevrolet Malibu 3.1L No Start VIN: 1G1ND52J33
Hello techs and thanks in advance; I have this customers car that intermittently will not start, have seen it fail once on my lot but did not look at the theft light on the dash, i do know that I had no spark when cranking and did not hear the fuel pump come o...
2004 Chevrolet Express 1500 5.3L MIL Lamp on VIN: 1GCFG15T84
This van came in for state inspection and failed for the mil being on with codes p0174 & p0171. Ive smoke the intake checked all 02 sensors, mass airflow sensor, fuel pressure (i even checked the amps the pump was pulling 9.5amp)and i noticed that intake gaske... Trouble codes: P0171 (Lean condition bank 1), P0172 (Lean condition bank 2)
2005 Chevrolet Silverado 1500 4.3L Monitors VIN: 1GCEC14XX5
Hey All, Hope someone can help on this one. I have a family members truck here and it will not pass emission testing. There are two monitors that will not run. The two are Evap and Cat. The truck has been driving for close to a month. I have performed both dri...
2001 GMC Safari SLE 4.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GTDM19W61
Vehicle idles rough all the time, hot or cold. Runs perfect off idle with no misfires. Towes a trailer no problem with plenty of power. Cyl number 5 and 6 racking up misfires constantly at idle. Smoke tested intake with no external leaks found. Trouble codes: P0155, P0300, P0452
1999 Oldsmobile Aurora 4.0L No Start VIN: 1G3GRR62C3
This car got towed in for no start.after testing we replaced fuel pump with a delphi pump.we also changed the relay and fuel filter.two weeks later the car came back.the fuel pump relay went bad.replaced the relay and car started.two weeks later car came back ...
1989 Pontiac 6000 LE 2.8L Stall VIN: 1G2AF51W9K
Car came in on a hook after a no start. Customer dropped by the shop at 7:00 am yesterday after leaving work and the car just died like he shut off the switch but would start back up with no issues. We were not open yet so he went across town to his house and ...
2000 Pontiac Grand Am SE 3.4L Stall VIN: IG2NF1ZE9M
Vehicle never shows any signs of a problem when we have it. There dosen't seem to be a pattern to the failure that I can determine. All basic engine system checks good. Trouble codes: P0122 (TPS Voltage Low)

Fixes & Summaries for GM
Fix/Summary Answers
1989 Chevrolet S10 Blazer 4.3L Excessive Emissions, MIL Lamp on VIN: 1GNCS1829K
Robert from Indiana said simply "GM has a chart for checking,chart C-9-A Thank you Robert,that was just what i needed.with this chart i was able to test the quad drivers in ecm (ok)test the other devices on circuit for proper resistance (ok) the problem ended... Trouble codes: 32 (Egr malfunction).
2006 Chevrolet Silverado 1500 LT 5.3L Cooling fans VIN: 2GCEK13T06
Circuit 335 itself tested good, but what I found was corrosion and moisture PCM connector C1. I backed out all corroded terminals and cleaned them with some Worth brand contact cleaner and used brake cleaner and compressed air to dry everything. I also applied...
2008 Chevrolet Silverado 3500 HD WT 6.6L Mechanical VIN: 608E162208
Thanks to every one who had HELPED! The info that I got was top shape! I found the EGR valve was stuck, notify the customer, and we're waiting for parts. IATN RoCKS!
2004 Pontiac Grand Prix GT1 3.8L Blower Motor VIN: 2G2WP52224
The replies I received are appreciated but all of them restated facts I already knew. Turns out the gray/black signal wire from the rotary switch is the key. That voltage MUST change as the knob is turned. The voltage would remain the same as it was whenever I...
2007 Saturn Aura XE 3.5L Cruise/Rev Lights/Pwr Locks VIN: 1G8ZS57N17
A big thank you to all. The customer has decided not to fix this car as of yet so I can't tell you the exact conclusion. But as an explanation Alex was the most helpful. I knew that the cruise control was a programmed option but didn't think about the rever...
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