Diagnostic Aids

WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

Inspect for intermittent conditions in the automatic transmission input (shaft) speed sensor (AT ISS) circuit.
Refer to INTERMITTENTS .
Inspect for intermittent conditions in the automatic transmission output (shaft) speed sensor (AT OSS) circuit.
Refer to INTERMITTENTS .
Ask the customer about possible overloading, exceeding the trailer towing limit, or towing in overdrive.
Ensure that the current calibration is correct for the final drive ratio.
Ensure the wiring harness is not stretched too tightly or other components are pressing on the A/T in-line 20-way connector body. Also inspect for proper clearance to any other components and wiring. Refer to INTERMITTENTS .