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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 72 (Automatic Transmission Diagnosis - 4L80-E (Diesel)) >> Diagnostic Tests >> DTC P1870: Transmission Component Slipping >> Condition No. 1 For Setting DTC P1870

Condition No. 1 For Setting DTC P1870

WARNING: This page is about a different car, the 2002 GMC Cab & Chassis Sierra and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The DTC will set when the conditions are met for running the DTC and 4th gear is commanded and the TCC is on and one of the following conditions occur.

After 3 occurrences, the PCM detects a slip speed of 120-525 RPM for greater than 6 seconds.

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