Make sure this part fits

Cadillac 12135078 Relay Asm,Start Motor Theft Deterrent

1996-2002 Cadillac

Customer Questions & Expert Answers (2)
12135078 GM Relay Asm,Start Motor Theft Deterrent Illustration 1 of 1
  • Part Description
    RELAY,Theft Deterrent or Frt/Rear/Side Object
  • Manufacturer
    General Motors
  • Manufacturer's Notes
    This part is discontinued.
Make sure this part fits
  • Related Parts
  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine Cadillac
    Manufacturer Part Number12135078
    Part DescriptionRELAY,Theft Deterrent or Frt/Rear/Side Object
    Item Dimensions4.2 x 2.3 x 2.3 inches
    Item Weight0.50 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU12135078
    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
    1996-1999 Cadillac Deville8 Cyl 4.6L4 DOOR, DEVILLE
    1996-2002 Cadillac Eldorado8 Cyl 4.6LELDORADO
    1996-1999 Cadillac Seville8 Cyl 4.6L4 DOOR, DEVILLE
  • Customer Questions & Expert Answers

    Q:
    I'm wondering if this is complete and correct part for my vehicle.
    A:
    You can Select Your Vehicle to check if 12135078 fits your vehicle.
    Posted and answered by GM Parts Specialist Julian
    Q:
    How are the primary Relay terminals usually divided between the control and power circuits for the 1999 Cadillac DeVille? Posted by Verified Customer
    A:
    Two of the relay terminals serve as the control circuit and connect to the relay coil, while the remaining terminals function as the power circuit. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Nicholas / Mar 23, 2025

Genuine GM Part 12135078, the Right Choice

To ensure reliability, purchase GM part # 12135078 Relay Asm,Start Motor Theft Deterrent. It is sometimes referred to as Cadillac Relay. 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 Cadillac Deville, Eldorado, Seville models.

GMPartsGiant.com is a leading supplier of genuine GM parts and accessories such as GM 12135078 Relay Asm,Start Motor Theft Deterrent. You're certainly in the right place if you're searching for the great cost-effective OEM GM parts. Look no further than our vast inventory of genuine GM parts offered at unbeatable online prices, all of which are backed by the manufacturer's warranty. Not to forget, our hassle-free return policy and quick delivery service ensure a smooth shopping experience for you. For detailed Cadillac parts information, click here.
Find low prices on genuine OE parts from GM dealerships with fast delivery and dedicated service at GMPartsGiant.com.