What transfer case does my Silverado have?
In short, the transfer case on a Silverado depends on the year, engine, and drivetrain. If your truck is 4x4, it uses a two-speed transfer case with a low range; if it’s 2WD, there is no transfer case. To know the exact model on your vehicle, check the transfer case tag, the glove-box RPO sticker, or pull your VIN/build sheet for the exact specification.
How to identify your Silverado’s transfer case
To determine the exact transfer case model for your Silverado, use these steps:
- Inspect the transfer case tag under the truck or on the case itself. The tag usually lists the model number (such as NP246, NP241, etc.) and sometimes a date code.
- Check the transfer case selector. An electronic shift with Auto/2Hi/4Hi/4Lo modes often corresponds to a modern GM two-speed transfer case, while a manual lever can indicate older variants.
- Look for a RPO (Regular Production Option) code on the glove-box sticker or door jamb; GM decodes these codes to identify the transfer case option.
- Use your Vehicle Identification Number (VIN) to pull the original equipment specifications from GM’s manuals or trusted parts catalogs to confirm the exact transfer case model and its gear ratios.
With the model number in hand, you can source the correct parts and service procedures from GM’s manuals or reputable repair guides.
Common transfer case families you might see
Across Silverado generations, GM used a few two-speed transfer cases in 4x4 configurations. The exact unit varies by year, engine, and option package, but these families are among the most frequently encountered:
- NP246/246-series: a two-speed, often chain-driven transfer case that’s common on many GM trucks from late 1990s to early 2000s.
- NP241/241X family: another two-speed option seen in some configurations, with variations in ratios and input/driven shaft design.
- Electronic/Active transfer cases: newer Silverado 4x4s may use electronically shifted units offering Auto 4WD or on-demand operation, with different fluid and service requirements than older mechanical-lever cases.
Because GM used several variants across generations, the actual unit on your truck can only be confirmed by checking the tag, RPO code, or VIN-based documentation.
What to do next
If you’re planning maintenance or parts replacement, start by confirming the exact model number, then consult the owner's manual or a GM service manual for the proper fluid type, capacity, and service intervals. When shopping for parts, bring the transfer case model or the RPO code to ensure you get the correct components for your Silverado.
Summary
Identifying your Silverado’s transfer case involves checking the case tag, the RPO/vin documentation, or the build sheet. In 4x4 models, a two-speed transfer case with a low range is typical, while 2WD trucks do not have a transfer case. The exact model number varies by generation and option package, so verify with official documentation or a dealer resource to ensure accurate parts and service.
What vehicles have the NP246 transfer case?
The most common vehicles this transfer case was used in were the Cadillac Escalade, Chevrolet Avalanche, Chevrolet K1500 Suburban, Chevrolet K2500 Suburban, Chevrolet Silverado 1500, Chevrolet Silverado 2500, Chevrolet Tahoe, GMC K1500 Suburban, GMC K2500 Suburban GMC Sierra 1500, GMC Sierra 2500, GMC Yukon, GMC Yukon ...
What year did Chevy have transfer case problems?
Transfer Case Rebuild & Repair Experts
If you drive a GM / Chevrolet truck or SUV built between the years of 1999 and 2007, this is an issue that you want to address before it becomes a truly expensive repair.
Which trucks have the NP261 transfer case?
NP261-NV261 History & Information
Common vehicles it was used in were the Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet Silverado 2500, GMC Sierra 2500, Chevrolet Silverado 3500, and GMC Sierra 3500. The case has a 2.72:1 low gear ratio with a left side drop output.
How do I know what transfer case I have in my Silverado?
In most cases you can identify by looking at the back of the transfer case. You should see an ID tag, serial number, nameplate, or something from the manufacturer to identify the model number. This is usually the best way to get some basic info about the transfer case in your vehicle.
