ALLISON 29540479 NSBU (NEUTRAL START BACK UP) SWITCH 2001-2004 GM 6.6L DURAMAX (MUST VERIFY YOUR EXISTING SWITCH) LEVELING KITS This manifold features a "full

This manifold features a "full bore" design that isn't kinked like the factory manifold on the 2001-2010 models

will provide a warranty for all claims including vehicles involved in accidents

and necessary fittings to make this a bolt-on installation

Lifted 0"-1"

ALLISON 29540479 NSBU (NEUTRAL START BACK UP) SWITCH 2001-2004 GM 6.6L DURAMAX (MUST VERIFY YOUR EXISTING SWITCH) LEVELING KITS This manifold features a "fullThe Allison 29540479 NSBU (Neutral Start Back Up) Switch is an OEM replacement for the faulty NSBU switch in your 2001 2004 GM 6. 6L Duramax LB7. Mounted on the transmission housing, the NSBU switch provides selector position information to the TCM. This switch detects the position of the shift lever and communicates to the TCM that the vehicle is in Neutral or Park so that starter can engage. The NSBU switch is known to fail, leading to issues like: