Test Description

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

3. This step tests the torque converter for slippage while in a commanded lock-up state.

Fig 1: DTC P1870 - 4.2L (Steps 1-5)

Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC P1870 - 4.2L (Steps 6-9)

Courtesy of GENERAL MOTORS CORP.

Fig 3: DTC P1870 - 4.2L (Steps 10-11)

Courtesy of GENERAL MOTORS CORP.

Fig 4: DTC P1870 - 4.2L (Steps 12-15)

Courtesy of GENERAL MOTORS CORP.