Description
Allison 1000 Pressure Switch Manifold, Duramax | 2001-2018 — 29546972
Genuine Allison part number 29546972 is the pressure switch manifold assembly for the Allison 1000 (LCT1000) 5-speed and 6-speed transmissions behind the 6.6L Duramax. It replaces earlier part numbers 29542585 and 24293418. The pressure switch manifold mounts on the valve body and tells the transmission control module the position of the shift valves: when fluid pressure is present, the switch sends a grounded signal to the TCM. Contamination, age and overheating can cause the switch to fail, leading to incomplete shifts, transmission fault codes or limp mode.
Working on the transmission? Refill with Castrol TranSynd 668 Full Synthetic ATF and replace the Allison 1000 External Spin-On Filter . Also see the Pressure Regulator Spring Service Tool and Pass Through Connector Seal and Body .
Product details
- Genuine Allison part number 29546972 (replaces 29542585 and 24293418)
- Pressure switch manifold assembly for the Allison 1000 valve body
- Fits both 5-speed (2001–2005) and 6-speed (2006–2018) Allison 1000 transmissions
- Built to original factory specifications
- Restores accurate shift valve position signals to the TCM
- Helps clear pressure switch-related codes and incomplete shifts
- Genuine Allison quality for a factory-correct repair
- 2001–2018 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax with Allison 1000 (LB7, LLY, LBZ, LMM, LML, L5P)
Fitment / application
Merchant Automotive Allison Pressure Switch Assembly 29546972
Confirm year, engine, transmission or axle configuration before ordering.
Manufacturer product reference: Specifications and fitment.
