High Country Suburban build confirmation

[3CarSeatDad]

Can someone confirm if the GM order workbench terminal is able to validate a custom build sequence:

 

1) Initialize the Allocation Base: Open a new vehicle build queue, select the 2026 Chevrolet Suburban 4WD, and pick the High Country (3LZ Preferred Equipment Group).

 

2) Select the Diesel Powertrain: Go directly to the engine configuration screen and choose RPO code LZ0 (3.0L Duramax Turbo-Diesel). Ensure it maps to the MHS 10-speed automatic transmission.

 

3) Deploy the Seating Swap: Navigate to the Interior Options screen and enter RPO code ATT to replace the standard captain's chairs with the power-release 60/40 bench seat. Because you are not trying to force a separate luxury or air-suspension bundle, the standard, premium D07 Fixed Floor Console remains active. The system will accept this change immediately without triggering a warning message.

 

3)Apply Heavy-Duty Hauling Capability: Input RPO code NHT (Max Trailering Package). The commercial terminal will automatically bundle the required trailering hardware and software modules to support the diesel engine's maximum towing capacity.

 

5) Layer the Premium Tech and Glass: Separately add code C3U (Panoramic Power Sunroof) and code UKL (Super Cruise) to the order screen.

 

6) Run the Final Validation: Click the "Validate Order" button at the bottom of the interface.

[newdude]

On 6/20/2026 at 9:49 PM, 3CarSeatDad said:

Can someone confirm if the GM order workbench terminal is able to validate a custom build sequence:

 

1) Initialize the Allocation Base: Open a new vehicle build queue, select the 2026 Chevrolet Suburban 4WD, and pick the High Country (3LZ Preferred Equipment Group).

 

2) Select the Diesel Powertrain: Go directly to the engine configuration screen and choose RPO code LZ0 (3.0L Duramax Turbo-Diesel). Ensure it maps to the MHS 10-speed automatic transmission.

 

3) Deploy the Seating Swap: Navigate to the Interior Options screen and enter RPO code ATT to replace the standard captain's chairs with the power-release 60/40 bench seat. Because you are not trying to force a separate luxury or air-suspension bundle, the standard, premium D07 Fixed Floor Console remains active. The system will accept this change immediately without triggering a warning message.

 

3)Apply Heavy-Duty Hauling Capability: Input RPO code NHT (Max Trailering Package). The commercial terminal will automatically bundle the required trailering hardware and software modules to support the diesel engine's maximum towing capacity.

 

5) Layer the Premium Tech and Glass: Separately add code C3U (Panoramic Power Sunroof) and code UKL (Super Cruise) to the order screen.

 

6) Run the Final Validation: Click the "Validate Order" button at the bottom of the interface.

 

 

 

No need.  Your answer is right in the order guide footnote for the LZ0 and High Country trim:

 

Vehicle Order Guide 

 

3. Not available with (UKL) Super Cruise or (ATT) second row power 60/40 split-folding bench seats. 2WD models not available with (PCU) Sun and Tow Package, (PDG) Technology and Entertainment Package or (PDM) High Country Deluxe.

 

 

Also.  MHS is the wrong 10 speed RPO.  MHS is 5.3 and 6.2 only.  

 

3.0 Duramax is paired with RPO code MQC 10 speed only.  

Edited Tuesday at 01:16 PM by newdude