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Prev Professional Automotive Repair Technical Discussions for February 25, 2013
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1995 Cadillac Seville STS 4.6L Starter VIN: 1G6KY5296S
Car was towed into shop for a no start. When ignition switch is turned on instrument panel will work normal and information bar at bottom will display circuit checks. It will display "SWITCH PROBLEM" then stop. When ignition switch is turned to start position...
2004 Cadillac CTS 3.6L Poor Idle Quality, MIL Lamp on VIN: 1G6DM57764
Ok guys code p0342 low came voltage bank one intake sensor replaced sensor still mil on checked voltage within spects you can clear codes test drive all day no mil cycle key of on mil will light p0342 help Trouble codes: P0342 (Bank 1 intake sensor low voltage)
2005 Cadillac STS 3.6L headlight assm VIN: 1G6DW67755
Hello all,I install 2 headlight bulbs in this 2005 Cadillac over a month ago.Now the customer is complaining of water in his headlight assm.I tried to tell him that GM his had problems with this and it is not due to are replacement of the bulbs.Well now I have...
1986 Chevrolet El Camino Conquista 5.0L Heat Guage VIN: 3GCCW80H1G
A friend bought an '86 ElCamino that has had a '94 5.7 P from a Y body installed. Nice job, runs great. The only issue is the Heat guage. Guages are new,(same as 86 Monte Carlo). Does anyone have the resistance to temp values for this guage. I can't find this ...
1995 Chevrolet K2500 Cheyenne 7.4L No Start, Cuts out, Stall VIN: 1GCGK24N0S
Truck came for stalling at idle and would start right back up.When driving its okay.Check throttle position sensor and scan tool was showing wierd voltages.When at idle it dies but not all the time.Cold has fast idle and doesnt happen.When dies its hard starti...
2000 Chevrolet Blazer LS 4.3L transmission VIN: 1GNDT13W1Y
Hello every one,I have this 2000 blazer that the 4 wheel would not engage in a snow storm,had to be pulled out a number of times during her mail route,it is a np233 transfer case first the lights would flash but would not go into 4 wheel got a code 2 flash cod...
2002 Chevrolet S10 2.2L Hydraulic System VIN: 1GCCS14502
First Off This Is A Comercial Vehicle For The Railroad. It Is used Around The Railyards Not Running Up & Down The Highway So Much. We Replaced the Slave Cyl. On 9/17/12 Because It Leaked Fluid And Caused The Clutch Not To Work. Then Truck Came Back On 10/11/12...
2003 Chevrolet Trailblazer LT 4.2L MIL Lamp on VIN: 1GNES16S63
Sets code p1345 - cam/crank position correlation. Problem is intermittent, happens every couple of days according to customer. Freeze frame data shows it happens 8-9 seconds after engine start up cold - CTS shows 46 deg. Desired cam pos. and actual cam positio... Trouble codes: P1345
2003 Chevrolet Blazer LS 4.3L front axle will not engage VIN: 1GNDT13X43
hello every one this t10 blazer is confusing the hell out of me and alldata does not seem to provide any discrition on how the whole system functions.i replace the vacuum actuator because it would not hold vacuum,after replacement still no engagement and actua...
2003 Chevrolet C4500 Kodiak C4C042 6.6L low engine temp VIN: 1GBC4E1173
Hey duramax techs, looking for a little help on this one. This truck came in with the complaint that the temp gauge reads low all the time. ECT readings verified very low temp, gauge sweeps normally. I replaced both thermostats, I found the t/stats in the inco...
2005 Chevrolet Uplander LS 3.5L Misfire VIN: 1GNDV23L05
Came in with check engine light. Change plug wires, EGR,SPARK PLUGS, COIL PACK , CHECK a/f sensor ,airfilter, fuel pressure,and still same thing. anyone have more info that will help. thank you Trouble codes: P0300 (Random misfire), P0306 (Misfire on 6 cylinder)
2009 Chevrolet Uplander LT 3.9L Sensors, Module VIN: 1GNDV33189
no more than 1.6 v on sensors. RF have .6v and inop. Other have 1.6 v and works properly. Supposed to have 5v. I tried a new module, don't works. Sensor wiring is good, some body help??

Fixes & Summaries for GM
Fix/Summary Answers
2004 Buick Rendezvous Ultra 3.6L Right front headlamp and fog lamp dim VIN: 3G5DB03704
Thanks for all your replies. Almost all of you were right. Bad Ground just behind the right headlight in front of the battery. Remove the 10 mm bolt and clean all rust, reinstalled and all lighting problems are fixed. Thanks again.
2003 Chevrolet Malibu 3.1L Battery VIN: 1G1ND52J53
Some replies said should be 25mA or less of a draw. Others stated that the modules must go to sleep and some said the key in switch could be bad. I rigged up some jumper wires to power up the system and removed the jumper after 30 minutes with my ammeter hooke...
2013 Chevrolet Malibu LT 2.0L Bcm VIN: 1G1PE5SB6D
A new wiring harness is not available yet for the car. Looking at getting one from a dry wreck donor.
1996 GMC K2500 Sierra SL 6.5L No Start VIN: 1GTGK24F6T
hey everybody! im sorry but I will have to close this post.told the owner that I need to spend some time on it but I ask him to pay his previous bill so I put the truck in the parking lot and I am waiting for him to show up with the money!if he decide to go f... Trouble codes: P1218.
2006 Hummer H3 3.5L MIL Lamp on VIN: 5GTDN13636
testing found intake leaking vacuum at pcv tube.customer declined repairs at this time.thank you for all tips on repair. Trouble codes: P0171.
1997 Pontiac Trans Sport 3.4L MIL Lamp on VIN: 1GMDX03E6V
Thank You all for your great info! Wire to relay from ECM rubbed threw/broken. IATN and it's members are the best! Trouble codes: P1651 (manufactures control auxiliary inputs auxiliary outputs).
2004 Pontiac Grand Prix GT1 3.8L Cuts out VIN: 2G2WP52204
After extensive diagnose I believe I have found the problem. After many Tech 2 snapshots and reviewing the usual suspects I decided to monitor the 5 volt reference signal (CKT 432 Lt Gn wire) to the pcm from the TP sensor. It was being intermittently being pul...
2002 Saturn L100 2.2L No Start VIN: 1G8JS54F12
Thanks to all that replied. The fix was to replace and flash a new oem BCM. I tried a used BCM but could not get it to even flash the security light or reset key.It acted just the same as not being plugged in. As soon as I plugged in the new one before having ... Trouble codes: B2957 (Data shorted to ground), B2960 (Passlock cylinder incorrect), P1599 (Engine stall or near stall), B2623 (u1000-), U1000 (u1096-), U1096 (testing and results).
2007 Saturn Ion-2 2.2L lf headlight VIN: 1G8AJ55FX7
Changed harness in headlight,GM does have a recall on some of the older ions,someone may have put a used older light in this or the recall has not caught up to it yet
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