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Mike S.
Mike S., ASE Certified Technician
Category: GMC
Satisfied Customers: 6702
Experience:  GMC N.A.I.S.E. Certified Auto-Mechanic
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GMC Canyon: I have two codes which are C0899 and U1064 My truck

Resolved Question:

I have two codes which are C0899 and U1064 My truck will not start what do i look for
Submitted: 4 years ago.
Category: GMC
Expert:  Mike S. replied 4 years ago.

From the fact that you said you are jump starting the vehicle and code C0899 refers to the battery voltage less than 9 volts, it appears there may be a problem with the charging system.

Code U1064 refers to a Lost Communications With Body Control Module (BCM).

If the generator battery control module loses communication with the body control module (BCM), the module will set U1064.

For more info on those codes, click here.

I would have the charging system checked. Usually any auto-parts store will check it for free.

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