Cadillac STS BCM Programming or Clone Service
$200.00
Cadillac STS BCM clone by Karman Auto is a precise bench-programming workflow for the 2005-2011 Cadillac STS and STS-V. Specifically, we read your original failed module, write the data byte-for-byte onto a donor you supply, and then verify the copy before shipping both back. Moreover, your VIN, immobilizer seed, and factory trim coding are preserved exactly. However, you are responsible for sourcing a donor that carries the identical factory part number — we do not sell or swap modules.
Cadillac STS 2005-2011 BCM Clone Service — Overview
The Cadillac STS (Seville Touring Sedan’s successor) was Cadillac’s rear- and all-wheel-drive luxury sedan built on the GM Sigma platform at the Lansing Grand River Assembly plant, sharing architecture with the Cadillac CTS, SRX, and STS-V. The STS’s body control module coordinates the Passlock III immobilizer, keyless access, adaptive forward lighting (AFL), memory seat/mirror recall, dual-zone climate, and Class 2 / GMLAN serial data between the ECM, TCM, and instrument cluster. Because the BCM is paired to the PCM and instrument cluster via rolling-code security seeds, a failed or swapped BCM cannot simply be installed — its data must be cloned from the original.
What This Service Is (And Is Not)
This is a cloning service only. Karman Auto does not sell parts or donor modules. You ship us two BCMs: your original (failed) unit and a donor unit you have sourced with the exact same part number. We read the data from your original, write it byte-for-byte onto your donor, re-read the donor to verify the copy, and ship both modules back to you.
Common Reasons Cadillac STS Owners Replace This BCM
No-crank with security lamp on, Passlock III anti-theft fault, keyless access / keyless-go not recognizing the fob, adaptive headlight (AFL) failures, BOSE amp communication dropouts, memory seat and mirror recall faults, dead instrument cluster or cluster U0140 “lost communication with BCM” DTCs, and internal solder-joint fatigue on the Siemens/Continental-based design. Replacement used units from salvage almost never learn in without proper cloning because the Sigma platform pairs the BCM seed to the PCM and cluster.
Platform & Technical Notes
Platform: GM Sigma (shared with Cadillac CTS Gen1/Gen2, SRX Gen1, and STS-V). Drivetrain options: Northstar 4.6L V8 (LH2), 3.6L LY7 V6, or supercharged 4.4L Northstar (LC3 in STS-V). Module supplier: Siemens VDO / Continental. Communication: Class 2 serial data plus GMLAN segment. Security: Passlock III with rolling code synchronized to the cluster and PCM. The STS pre-dates GM Global A architecture, so it cannot be programmed with SPS/TIS2Web — donor modules must be cloned rather than reflashed.
Why Cadillac STS Owners Come to Us
Because STS BCMs are no longer produced by GM and remanufactured units are effectively unobtainable, cloning is the only realistic path to keep an STS on the road. We preserve your Passlock III rolling-code seed, VIN, odometer reference, AFL configuration, BOSE/non-BOSE coding, and all original trim options so the donor behaves exactly like your failed module.
Common Cadillac STS BCM Part Numbers
The BCM on the 2005-2011 Cadillac STS is commonly seen in the following part numbers. Your exact part number must match the donor you supply — mixing part numbers will not work even within the same platform family. Check the label on your original BCM before sourcing a donor.
25941540152930302091116120820300258500131588110715230498258302982577643015881106208694102577010815227020
This is a common-numbers reference. If your original carries a number not on this list, that is fine — the requirement is simply that your donor carries the same number as your original.
Shipping Instructions
After you complete checkout, your order receipt will include the shipping address for Karman Auto. Please follow these steps:
- Remove your failed BCM from the vehicle following the factory service information for your 2005-2011 Cadillac STS.
- Source a donor BCM with the exact same part number as your original. We cannot substitute part numbers.
- Mark the original module “OLD” clearly with tape, a sticker, or a permanent marker. This tells us which module to read the data from.
- Print your order receipt and enclose it in the shipping box — the receipt contains the return address we will use to ship both modules back to you.
- Pack both modules (original + donor) in anti-static bubble wrap inside a sturdy box. Ship to the address shown on your receipt.
Turnaround
Typical bench time is 24-48 hours from the moment both modules arrive at our shop. Rush service is available on request — contact us before you ship.
How to Order
Add this Cadillac STS BCM clone service to your cart and complete checkout. Your receipt will include our shipping address. Ship us your marked original BCM plus a matching-part-number donor with the receipt enclosed. We clone, verify, and return both modules to you.
Related Services & References
Looking for module cloning on other makes? Browse our full module cloning catalog for ECU, cluster, airbag, and immobilizer services across GM, Ford, Chrysler, Volvo, and European platforms. For background on this specific platform, see the Cadillac STS platform reference. Additionally, if you’re unsure whether your exact part number is supported, contact us first with a photo of the label — we reply the same business day.
Warranty
1:1 Data Transfer Guarantee
Karman Auto guarantees a byte-for-byte 1:1 data transfer from your original BCM onto your supplied donor. We read the original, write the donor, and re-read the donor to verify the copy before shipping. This is the only warranty we offer. We do not warranty the donor hardware, installation, wiring, or any unrelated vehicle issue. You are responsible for sourcing a functional donor with the matching part number.
