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Chevrolet 24221125 Neutral Safety Switch

2003-2009 Chevrolet

Customer Questions & Expert Answers (2)
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24221125 GM Neutral Safety Switch Illustration 1 of 1
  • Part Description
    Switch, Parking/Neutral Position & Backup Lamp
  • Manufacturer
    General Motors
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$91.11 MSRP: $155.80
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  • Specifications
  • Fitment
  • Q&A

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  • Product Specifications

    BrandGenuine Chevrolet
    Manufacturer Part Number24221125
    Part DescriptionNeutral Safety Switch; Switch, Parking/Neutral Position & Backup Lamp
    Item Dimensions10.6 x 6.1 x 3.0 inches
    Item Weight1.00 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU24221125
    WarrantyThis genuine GM part is guaranteed by GM's factory warranty.
    Shipping & ReturnShipping Policy Return Policy
    Warning: California's Proposition 65

  • Vehicle Fitment

    Year Make Model Engine Important vehicle option details
    2004-2005 Chevrolet Astro6 Cyl 4.3LVAN ASTRO
    2004-2008 Chevrolet Avalanche8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L, 8 Cyl 8.1L1/2 TON, 3/4 TON
    2003-2005 Chevrolet Blazer6 Cyl 4.3L2 DOOR, 4 DOOR
    2004-2008 Chevrolet Colorado4 Cyl 2.8L, 4 Cyl 2.9L, 5 Cyl 3.5L, 5 Cyl 3.7LCREW CAB, EXTENDED CAB, EXTENDED LENGTH, PICKUP
    2004-2005 Chevrolet Corvette8 Cyl 5.7L, 8 Cyl 6.0L2 DOOR, CONVERTIBLE, NOTCHBACK
    2003-2009 Chevrolet Express6 Cyl 4.3L, 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L, 8 Cyl 6.6L Diesel1 TON CARGO EXPRESS, 1 TON COMMERCIAL/RV CUTAWAY, 1 TON PASSENGER, 1/2 TON CARGO EXPRESS, 1/2 TON PASSENGER EXPRESS, 3/4 TON CARGO EXPRESS, 3/4 TON PASSENGER EXPRESS
    2003-2004 Chevrolet S104 Cyl 2.2L, 6 Cyl 4.3LCREW CAB, PICKUP, PICKUP EXTENDED CAB
    2004-2008 Chevrolet Silverado6 Cyl 4.3L, 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L, 8 Cyl 6.6L Diesel, 8 Cyl 8.1L1500 CREW CAB LONG BOX, 1500 CREW CAB STANDARD BOX, 1500 EXTENDED CAB LONG BOX, 1500 EXTENDED CAB SHORT BOX, 1500 EXTENDED CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX, 2500 CREW CAB LONG BOX, 2500 CREW CAB STANDARD BOX, 2500 EXTENDED CAB LONG BOX, 2500 EXTENDED CAB STANDARD BOX, 2500 REGULAR CAB, 3500 CHASSIS EXTENDED CAB 161.5, 3500 CHASSIS REGULAR CAB 137.0, 3500 CHASSIS REGULAR CAB 161.5, 3500 CREW CAB, 3500 EXTENDED CAB, 3500 REGULAR CAB, CLASSIC 1500 CREW CAB LONG BOX, CLASSIC 1500 CREW CAB STANDARD BOX, CLASSIC 1500 EXTENDED CAB LONG BOX, CLASSIC 1500 EXTENDED CAB SHORT BOX, CLASSIC 1500 EXTENDED CAB STANDARD BOX, CLASSIC 1500 REGULAR CAB LONG BOX, CLASSIC 1500 REGULAR CAB STANDARD BOX, CLASSIC 2500 CREW CAB LONG BOX, CLASSIC 2500 CREW CAB STANDARD BOX, CLASSIC 2500 EXTENDED CAB LONG BOX, CLASSIC 2500 EXTENDED CAB STANDARD BOX, CLASSIC 2500 REGULAR CAB, CLASSIC 3500 CHASSIS EXTENDED CAB 161.5, CLASSIC 3500 CHASSIS REGULAR CAB 137.0, CLASSIC 3500 CHASSIS REGULAR CAB 161.5, CLASSIC 3500 CREW CAB, CLASSIC 3500 EXTENDED CAB, CLASSIC 3500 REGULAR CAB, CREW CAB 1/2 TON, EXTENDED CAB 5'8" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON
    2004-2006 Chevrolet SSR8 Cyl 5.3L, 8 Cyl 6.0LSPORT TRUCK
    2004-2008 Chevrolet Suburban8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L, 8 Cyl 8.1L1/2 TON, 1500 CREW CAB, 1500 CREW CAB LONG BOX, 1500 CREW CAB STANDARD BOX, 1500 EXTENDED CAB LONG BOX, 1500 EXTENDED CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX, 2500 CREW CAB LONG BOX, 2500 CREW CAB STANDARD BOX, 2500 EXTENDED CAB LONG BOX, 2500 EXTENDED CAB STANDARD BOX, 2500 REGULAR CAB, 3/4 TON, 3500 CHASSIS EXTENDED CAB 161.5, 3500 CHASSIS REGULAR CAB 137.0, 3500 CHASSIS REGULAR CAB 161.5, 3500 CREW CAB, 3500 EXTENDED CAB, 3500 REGULAR CAB, 4 DOOR 1/2 TON, CLASSIC 1500 CREW CAB LONG BOX, CLASSIC 1500 EXTENDED CAB LONG BOX, CLASSIC 1500 EXTENDED CAB STANDARD BOX, CLASSIC 1500 REGULAR CAB LONG BOX, CLASSIC 1500 REGULAR CAB STANDARD BOX, CLASSIC 2500 CREW CAB LONG BOX, CLASSIC 2500 CREW CAB STANDARD BOX, CLASSIC 2500 EXTENDED CAB LONG BOX, CLASSIC 2500 EXTENDED CAB STANDARD BOX, CLASSIC 2500 REGULAR CAB, CLASSIC 3500 CHASSIS EXTENDED CAB 161.5, CLASSIC 3500 CREW CAB, CLASSIC 3500 EXTENDED CAB, CLASSIC 3500 REGULAR CAB, EXT 1/2 TON, EXT 3/4 TON, XL 1/2 TON, XL 3/4 TON, YUKON/DENALI
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  • Customer Questions & Expert Answers

    Q:
    I would like to confirm if this is the correct part number for my vehicle. Please advise. Thank you.
    A:
    You can Select Your Vehicle to check if 24221125 fits your vehicle.
    Posted and answered by GM Parts Specialist Henry
    Q:
    How to Replace or Adjust the Back Up Light Switch and Neutral Safety Switch on Chevrolet Trailblazer? Posted by Ofori A.
    A:
    The Park/Neutral Position switch, part of the transmission range switch mounted on the side of the transmission, serves as an information sensor for the Powertrain Control Module (PCM), preventing engine start in any gear other than park or neutral and activating the back-up lights when the shift lever is in reverse. To ensure proper function, verify that the engine starts only in Park or Neutral; if it starts in other gears, readjust the switch by loosening the mounting bolts and turning it slightly until the desired operation is achieved, then tighten the bolts. For replacement, disconnect the negative battery cable, apply the parking brake, and place the shift lever in Neutral. Locate the PNP switch on the transmission, disconnect the shift cable and electrical connectors, and remove the manual lever retaining nut before carefully detaching the manual lever without moving it from the Neutral position. Remove the switch retaining bolts to detach the switch from the transmission. When installing a new switch, align the slots with the notch on the switch body, or for an old switch, align the flats of the manual shaft with those of the PNP switch. Secure the switch with mounting bolts and torque them, reinstall the manual lever and tighten the nut, then reattach the shift cable and electrical connectors, completing the installation in reverse order of removal.
    You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Jeremy / Jun 01, 2025

Genuine GM Part 24221125, the Right Choice

To ensure reliability, purchase GM part # 24221125 Neutral Safety Switch. It is sometimes referred to as Chevrolet Automatic Transmission Shift Position Sensor Switch, Chevrolet Back Up Light Switch, Chevrolet Neutral Safety Switch. Directly from GM, genuine parts are superb with regards to quality, longevity, and fit. Every single part passed stringent quality testing, so you can be sure that it's safe, durable, and built to perform like your original parts. This part fits specific Chevrolet Blazer, Silverado, Tahoe models.

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