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field--name-field-product-description field--type-text-with-summary field--label-hidden field__item\u0022\u003E\u003Cp\u003EComes with connector set. Color coded wires make for an easy install.\u003C\/p\u003E\n\u003Cp\u003EComes with OE style connectors and approximately 12 Inch of lead.\u003C\/p\u003E\n\u003Cp\u003EOne of the most common problems with the Allison transmission is failure of the Neutral Safety Back Up switch.\u003C\/p\u003E\n\u003Cp\u003ESome of the symptoms of failure include but are not limited to:\u003C\/p\u003E\n\u003Cul\u003E\n\u003Cli\u003ENo start condition\u003C\/li\u003E\n\u003Cli\u003EGear shift indicator on dash not following properly\u003C\/li\u003E\n\u003Cli\u003ETrans stuck in limp mode or fail safe\u003C\/li\u003E\n\u003Cli\u003EDTC\u0027s set indicating pressure switch codes\u003C\/li\u003E\n\u003C\/ul\u003E\n\u003Cp\u003EThis switch easily installs with just common hand tools.\u003C\/p\u003E\n\u003Cp\u003EHow does it work and why does it cause my transmission not to shift?\u003C\/p\u003E\n\u003Cp\u003EThe vehicle is equipped with a column type shift selector. 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 transmits selector position information to the TCM.\u003C\/p\u003E\n\u003Cp\u003EThe NSBU switch mounts directly onto the transmission housing, from the outside, and detects the angular position of the shift selector shaft. This position is communicated to the TCM so that certain vehicle control functions can be coordinated with the position of the shift controls. The neutral signal output of the NSBU switch is typically used as confirmation that the transmission is in NEUTRALor Park before the engine starter is engaged.\u003C\/p\u003E\n\u003Cp\u003ECommon trouble codes associated with NSBU failure include:\u003C\/p\u003E\n\u003Cul\u003E\n\u003Cli\u003EDTC P0708, Neutral start\/backup (PNP or NSBU) switch\u003C\/li\u003E\n\u003Cli\u003EDTC P0847, Pressure Switch Manifold (PSM)\u003C\/li\u003E\n\u003Cli\u003EDTC P0872, Pressure Switch Manifold (PSM)\u003C\/li\u003E\n\u003Cli\u003EDTC P0875, Pressure Switch Manifold (PSM)\u003C\/li\u003E\n\u003Cli\u003EDTC P1711, Pressure Switch Manifold (PSM)\u003C\/li\u003E\n\u003Cli\u003EDTC P1713, Pressure Switch Manifold (PSM)\u003C\/li\u003E\n\u003Cli\u003EDTC U1000, Serial Data Communications\u003C\/li\u003E\n\u003Cli\u003EBlank Prndl Display\u003C\/li\u003E\n\u003Cli\u003EFlashing Prndl Display\u003C\/li\u003E\n\u003Cli\u003ESlow or No Engagement of Automatic Transmission\u003C\/li\u003E\n\u003C\/ul\u003E\n\u003Cp\u003EThe reason that PSM codes may set is that the NSBU switch and the internal PSM switch look at each other and compare readings Basically, the NSBU switch lets the TCM know what gear position that you, the driver, have selected. The PSM has the job of telling the TCM what gear the transmission is in based on hydraulic inputs. If the data received from the PSM and the NSBU do not agree, the above mentioned trouble codes may set.\u003C\/p\u003E\n\u003Cp\u003EThe NSBU is subject to water contamination and will allow the switch to give faulty readings. Includes:\u003C\/p\u003E\n\u003Cul\u003E\n\u003Cli\u003E1x NSBU Switch, LB7, 2001-2004 Allison 1000\u003C\/li\u003E\n\u003Cli\u003E1x NSBU Connector Repair Kit, LB7, 2001-2004\u003C\/li\u003E\n\u003C\/ul\u003E\n\u003Cp\u003E\u003Cstrong\u003EDetails:\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cul\u003E\n\u003Cli\u003EEngine Manufacturer: Duramax\u003C\/li\u003E\n\u003Cli\u003ELiter: 6.6 Liter\u003C\/li\u003E\n\u003Cli\u003EEngine Designation: LB7\u003C\/li\u003E\n\u003Cli\u003EEngine Years: 2001-2004\u003C\/li\u003E\n\u003Cli\u003ETransmission Code: Allison 1000\u003C\/li\u003E\n\u003C\/ul\u003E\n\u003Cp\u003E\u003Cstrong\u003EApplications:\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cul\u003E\n\u003Cli\u003E2001-2004 Silverado\/Sierra 2500HD\/3500HD LB7\u003C\/li\u003E\n\u003C\/ul\u003E\u003C\/div\u003E\n      \u003C\/article\u003E\n","dialogOptions":{"width":"80%","dialogClass":"product-quick-view","buttons":[],"modal":true,"title":"Allison 1000 NSBU Switch with Connector Repair Kit, Duramax 2001-2004 Silverado\/Sierra 2500HD\/3500HD LB7 Merchant Automotive","classes":{"ui-dialog":"product-quick-view"}}}]