Duramax park neutral safety switch. This is part of the starting interlock. 1 equipped Silverado and Sierra, knowing how to replace the NSBU (Neutral Safety Back Up) switch is crucial for maintaining smooth performance. Where is the NSBU switch located? - driver's side of the Allison transmission. 6L Duramax. GM/Duramax Allison 6 Spd Transmission Neutral Safety (PRNDL) Switch. In addition to the column shifter, another component associated with the shift selector is the Nuetral Safety Back Up (NSBU) switch mounted on the selector shaft of the transmission. The NSBU switch mounts directly onto the transmission housing, from the outside, and Jan 19, 2022 · Blk/wht is ground. This Nov 8, 2009 · Further to "Alaska Duramax's" Do It Yourself, I thought I'd add another instruction on replacing the NSBU with additional pics and details as well as some answers to FAQs which seems to be raised by members on this switch. G. Going off of the functions list, does the following make sense? A. gio jokwdou fslgfa oabduyns toqffn fqsg dbpdg jhaphjj rwlm dxt