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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 813 (Automatic Transmission - 4L80-E/4L85-E (Service & Replacement)) >> Diagnostic Information and Procedures >> DTC P0757: Gear Ratio >> Circuit Description

Circuit Description

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

The 2-3 shift solenoid (SS) valve controls fluid flow acting on the 2-3 shift valves. The 2-3 SS valve is a normally-open exhaust valve used with the 1-2 SS valve in order to allow for four different shift combinations.

If the powertrain control module (PCM) detects a non third gear ratio while third gear is commanded, then DTC P0757 sets. DTC P0757 is a type C DTC. For California emissions vehicles and vehicles under 8,600 GVW, DTC P0757 is a type A DTC.

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