2025 GMC Sierra 1500 Updates, Changes, New Features

The 2025 GMC Sierra 1500 receives a variety of small changes for the seventh model year of the full-size, half-ton truck’s fourth generation.

These changes follow the 2019 Sierra 1500, which received a complete overhaul (re-engineering and redesign) and launched the fourth-gen model, followed by a mid-cycle refresh for the 2022.5 Sierra 1500, along with small changes to the 2023 Sierra 1500 and the 2024 Sierra 1500.

Model Line

• No Changes

Exterior

• Deletion of two exterior colors:
  • Dynamic Blue Metallic (GLT)
  • Deep Bronze Metallic (GXN)

Dynamic Blue Metallic

Deep Bronze Metallic

• Change in the availability of four tire options on AT4:
  • LT275/65R18C blackwall Goodyear Wrangler Territory MT tires now optional on AT4
    • For the 2024 model year, this tire was standard on AT4
    • 275/60R20 all-terrain blackwall tires now standard on AT4
    • For the 2024 model year, this tire was optional on AT4
  • Spare 255/80R17SL all-season blackwall tire is now standard on AT4
    • For the 2024 model year, 265/70R17 was the standard spare on AT4
    • Spare 265/70R17SL all-season, blackwall tire is now optional on AT4
• Change in the availability of two wheel options on AT4:
  • 20-inch machined aluminum wheels with Carbon Grey Metallic accents (NZH) now standard on AT4
  • 18-inch machined aluminum wheels with dark painted pockets (57N) now optional on AT4
• Addition of 22-inch Bright split-spoke wheels (LPO, SFU)
• Tailgate (QK1) is now standard on 3SA, 3VL and 3SB
  • For the 2024 model year, Tailgate (QK1) was available as an option because MultiPro Tailgate (QK2) was standard
• MultiPro Tailgate (QK2) is now optional on 3SA, 3VL and 3SB

Standard Tailgate (QK1)

MultiPro Tailgate (QK2)

• Spray-on Bedliner (CGN) will have GMC logo on back wall on 4SB, 4SG, 5SA, and 5SB
  • Some 2024 model year trucks had this, but not all

Interior

• No Changes

Mechanical

• Change in availability of two transmission options:
  • 10-speed automatic transmission (MI2) now requires 4WD 1SA Crew Cab model
    • For the 2024 model year, 10-speed automatic transmission (MI2) was available with 2WD or 4WD
    • For both 2024 and 2025 model years, the MI2 transmission is included and only available with Police Pursuit Package (9C1), Special Services Package (5W4) or E85 FlexFuel capability (FHS)
  • 10-speed automatic transmission (MQB) with bench seat on 3SB and 4SA Requires a 4WD model
    • For the 2024 model year, 10-speed automatic transmission (MQB) was available on 2WD or 4WD
    • For both 2024 and 2025 model years, the MQB transmission is one of two transmissions used in conjunction with the 3.0L I6 LZ0 turbodiesel Duramax engine
      • The other transmission used in conjunction with the LZ0 is the 10-speed automatic (MQC), which has Electronic Transmission Range Selector (ETRS) and paddle shifters – features that the MQB lacks
• Addition of Universal Vehicle Module (KGU)
  • The Universal Vehicle Module enables CAN readability of selected messages utilizing SAE J1939 formatting, offering 10-switchable inputs and outputs, and includes a graphical user interface to customize specific needs with more than 150 operating parameters available to read.
• E85 FlexFuel capable (FHS) now requires 4WD 1SA Crew Cab model
  • For the 2024 model year, E85 FlexFuel capability (FHS) did not require 4WD, and was available with either 2WD or 4WD
  • Requires:
    • Fleet or Government Sales order
    • 4WD Crew Cab model
    • 5.3L EcoTec3 V8 L84 engine
    • Trailer brake controller (JL1)
  • Not available with:
    • 1SA Safety Plus Package (PQA)
  • Selecting FHS deletes automatic stop/start (KL9)

Driver Assist Technology

• Super Cruise (UKL) is now standard on Denali Ultimate
  • For the 2024 model year, was only available as an option on Denali and Denali Ultimate
• Cruise Control (K34) now standard on 1SA
  • For the 2024 model year, Cruise Control (K34) was available as an option on 1SA
• Trailer brake controller (JL1) now standard on 3SA, 3SB and 4SA
  • For the 2024 model year, this was only available as an option on 3SA, 3SB and 4SA

Packages

• No changes

Discussion

Discuss the 2025 GMC Sierra 1500 in our GMC forum.

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