go back
Technical Service Bulletins

When a particular problem occurs frequently with a vehicle, the auto manufacturers research the problem, identify the symptoms, and determine the most accurate way to fix the problem. This information is compiled into a technical service bulletin (TSB) and provided to the auto dealers. TSB's are not recalls and the repair facility will charge for the repair of your vehicle if warranty has expired.

TSB's are extremely helpful when purchasing a new or used vehicle. A list of TSB's on the vehicle will let you know all the common problems that could occur. TSB's also are great in assisting the automotive technician with quickly diagnosing and repairing the problem. Bulletins can range in page numbers from 1 to however many gets the job done.

Following is an example of a one page General Motors TSB:

Battery Goes Dead At Times - keywords charge charging crank current dead drain draw excessive inop inoperative int intermittent lo low load no nostart nocrank parasitic start voltage - (Feb 26, 2009)

Subject: Battery Goes Dead At Times

Models: 2007 Cadillac Escalade, Escalade ESV, Escalade EXT
2007 Chevrolet Avalanche, Silverado, Suburban, Tahoe
2007 GMC Sierra, Yukon, Yukon Denali, Yukon XL, Yukon Denali XL

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this bulletin.

Condition/Concern:

Some customers may state that the battery goes dead at times. The concern is very random and doesn't seem to have a set pattern. When the vehicle returns to the shop, the technician may be unable to duplicate the concern.

Recommendation/Instructions:

Note: Only apply the information to 2007 model year vehicles. A separate PI (Preliminary Investigation) has been created for the 08-09 model year

If you experience a vehicle that has an intermittent battery draw, please follow the instructions below and then review the template below that lists all related PI's and Bulletins. If it becomes necessary to contact Technical Assistance, please record the results for all the PI's and Bulletins that apply to your vehicle prior to calling.

  1. When vehicle is towed into the shop, please record the static voltage of the battery by using a DVOM at the battery posts before charging the battery or performing any diagnostics.
  2. Perform a parasitic load test as listed in SI (See Example Document Id: 1741191)
  3. Perform and record the results for all PI's and bulletins that apply to your vehicle in the following template.

Bulletin or PI number

Description

08-06-03-008.

Information on Intermittent Battery Drain Diagnostic Tips and Recommendations

06-06-03-013C

BCM Update for RVC

PIT4613A

Check Mega Fuse

PIT4050E

Ckts (6815 or 6817) Shorted or the ISLPS/IS Lamps fuse may blow

PIT3984A

Rear Doors Will Not Unlock / Battery Draw

AIT3236

Battery Cables

07033B

Battery Rundown

07007C

Remote Keyless Entry Inoperative & Battery Rundown

PIT3385E

Roof Beacon Switch Left On Causing Battery Draw

06-06-03-011B

Hum or Buzz Noise From Rear of Vehicle and/or Possible Dead Battery (Check Fuel Pump Relay)

07-06-03-002B

Information on Inspecting Top Post Battery Cable Bolts, Clamps, and Nuts During Pre Delivery Inspection

PIT4412A

Vehicle Will Not Crank / Start At Times/ Aftermarket theft relay

09-08-44-001

US8/US9 Radio

PIT3971A

Multiple Electrical Concerns due to wiring in B pillar

06-08-44-032B

Rear DVD Screen Blank/Inoperative, Speaker Pop Noise, Battery DrawNav Screen Flashing,

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

Order your TSB now!