TSB PIP3366C — Cadillac, Chevrolet and GMC Service bulletin

PIP3366C is a service bulletin on file with NHTSA for 4 Cadillac, Chevrolet and GMC models, 1999 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.

What the bulletin says. This Preliminary information communicates to the dealer technician thatLight Duty Trucks equipped with automatic transmissions and 4 wheel drive may exhibit a condition of grinding/ratcheting type noise when shifting the automatic transmission into park while the transfer case…

NHTSA's own summary of the document, quoted from the public manufacturer-communications file.

1Document filed
4Vehicles named
1Model year

Vehicles and model years PIP3366C names

VehicleModel years
Cadillac Escalade 1999
Chevrolet Blazer 1999
Chevrolet Silverado 1500 1999
GMC Yukon 1999

Every document filed under PIP3366C

Document IDFiledType
PIP3366C July 9, 2018 Service bulletin

What PIP3366C covers

Transmission & drivetrain — the component vocabulary NHTSA files this communication under.

← All Cadillac Escalade TSB years TSB lookup by model

Questions buyers ask

What is TSB PIP3366C?

PIP3366C is a service bulletin filed with NHTSA by Cadillac, Chevrolet and GMC, covering 4 Cadillac, Chevrolet and GMC models across the 1999 model years. NHTSA's summary reads: This Preliminary information communicates to the dealer technician thatLight Duty Trucks equipped with automatic transmissions and 4 wheel drive may exhibit a condition of grinding/ratcheting type noise when shifting the automatic transmission into park while the transfer case…

Which vehicles does PIP3366C cover?

NHTSA's file names Cadillac Escalade (1999); Chevrolet Blazer (1999); Chevrolet Silverado 1500 (1999); GMC Yukon (1999). A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.

Is TSB PIP3366C a recall, and is the repair free?

No. PIP3366C is repair guidance the manufacturer sent its dealers, not a safety defect finding. You pay for the work unless the vehicle is still under warranty. Recall repairs, by contrast, are always free.

How do I get the full text of PIP3366C?

Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under PIP3366C, its date, and NHTSA's own summary from the public file.

Data updated 2026-08-20 from NHTSA's public records

Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. This page lists only what NHTSA's manufacturer-communications file records under PIP3366C. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.