GMC Sierra 1500 — T1XX (2019–2026)

NICB's VIN manuals list this Sierra 1500 from 2019 to 2026 in Fleet/Base (PRO in the 2026 manual), SLE, Elevation, SLT and Denali series with 4x2 and 4x4 drive and an AT4 in 4x4 only, adding AT4X, Denali Ultimate and Elevation-L (4WD) from the 2022 manual; NICB 2022 also prints the 2022 Sierra Limited under the 2021 Sierra's VIN codes (8A–9G, Fleet/Base through Elevation-L), so this doc covers the 2022 Sierra Limited (through the bare sierra alias and its Elevation, SLT, AT4, Denali and Elevation-L badges; the sierra limited, sierra limited sle and sierra limited fleet names belong to the K2XX doc's aliases), while the 2019 Sierra Limited (Fleet/Base and SLE only, on the 2018 codes) is the K2XX and belongs to that doc. GM's own lists here are the RPO code lists of the GM Upfitter Sierra 1500 electrical body-builder manuals for 2019, 2020, 2022 (the new model), 2023, 2024 and 2025 and the RPO code pages of the 2025 and 2026 Sierra 1500 fleet order guides, with those guides' trim-group and COLOR AND TRIM pages (trim groups 1SA Pro, 3SA SLE, 3VL and 3SB Elevation, 4SA SLT, 4SB AT4, 4SG AT4X, 5SA Denali and 5SB Denali Ultimate; Regular, Double and Crew Cab); the 2022 and 2023 Wayback captures of the Sierra Denali 1500 guide show only the model list (2WD and 4WD Regular, Double and Crew Cab) and the 2022 menu's separate Sierra/Denali 1500 Limited, with no codes. No list in the archive is dated 2021 (the 2020 manual, which GM Upfitter files for 2020 and 2021, prints the 2020 engineering-year and VIN-year codes and is cited for 2020 only) and none is the 2022 Sierra Limited's own, so a year missing from a row means no source was read for it, not that the code was absent. The lists print the Fort Wayne, Indiana (FWI) and Silao, Mexico (MSL) plant codes; Notes give the upfitter lists' wording where the guides name a code differently, and the guides' trim marks are not transcribed row by row.

Codes

Engines

Transmissions

Axles

Packages & Trims

Equipment

Paint

Interior Trim

Internal / Process

Sources

Factory documents (T1)

• gmc/2019-gmc-19-sierra-1500-body-builder-feb-20.txt — GMC Sierra LD Pick Up ELECTRICAL Section (NEW body style) (GM Upfitter), 2019, RPO code list pp.9–15 — https://www.gmupfitter.com/wp-content/uploads/2021/05/19_sierra_1500_body_builder_Feb_20_.pdf
• gmc/2020-gmc-20-sierra-1500-electrical-body-buil-1.txt — GMC Sierra LD (1500) Pick up ELECTRICAL Section (GM Upfitter, listed for model years 2020 and 2021), 2020, RPO code list pp.9–16 — https://www.gmupfitter.com/wp-content/uploads/2021/05/20_Sierra_1500_Electrical_Body_Buil-1.pdf
• gmc/2022-gmc-22-sierra-1500-new-electrical-body-builder-sm-en-us-2022jul20.txt — 2022 GMC Sierra LD (1500) NEW model ELECTRICAL Body Builder Manual (GM Upfitter), RPO code list pp.10–16 — https://www.gmupfitter.com/wp-content/uploads/2023/05/22_Sierra_1500_New_Electrical_Body_Builder_SM_en_US_2022JUL20.pdf
• gmc/2023-gmc-23-sierra-1500-electrical-body-builder-sm-en-us-2022oct12.txt — GMC Sierra LD (1500) ELECTRICAL Body Builder Manual, 2023 (GM Upfitter), RPO code list pp.9–16 — https://www.gmupfitter.com/wp-content/uploads/2022/10/23_Sierra_1500_Electrical_Body_Builder_SM_en_US_2022OCT12.pdf
• gmc/2024-gmc-24-sierra-1500-sm-electrical-body-builder-esid-23dec12.txt — GMC Sierra LD (1500) ELECTRICAL Body Builder Manual, 2024 (GM Upfitter), RPO code list pp.10–19 — https://www.gmupfitter.com/wp-content/uploads/2023/12/24_Sierra_1500_SM_electrical_body-builder_esid_23DEC12.pdf
• gmc/2025-gmc-my25-sierra-1500-electrical-bbm.txt — GMC Sierra LD (1500) ELECTRICAL Body Builder Manual, 2025 (GM Upfitter), RPO code list pp.8–17 — https://www.gmupfitter.com/wp-content/uploads/2025/02/MY25-Sierra-1500-Electrical-BBM.pdf
• gmc/2025-gmc-sierra-1500-retail-and-fleet-fleet-order-guide-rpo-codes.txt — 2025 GMC Sierra 1500 Retail and Fleet — GM Fleet Order Guide, RPO Codes
• gmc/2025-gmc-sierra-1500-retail-and-fleet-fleet-order-guide.txt — 2025 GMC Sierra 1500 Retail and Fleet — GM Fleet Order Guide (Print All): OnStar pages pp.109–111 and COLOR AND TRIM pages pp.167–171
• gmc/2026-gmc-sierra-1500-retail-and-fleet-fleet-order-guide-rpo-codes.txt — 2026 GMC Sierra 1500 Retail and Fleet — GM Fleet Order Guide, RPO Codes
• gmc/2026-gmc-sierra-1500-retail-and-fleet-fleet-order-guide.txt — 2026 GMC Sierra 1500 Retail and Fleet — GM Fleet Order Guide (Print All): OnStar pages pp.52–53 and COLOR AND TRIM pages pp.83–88
• gmc/2022-gmc-new-sierra-denali-1500-fleet-order-guide-wayback.txt — 2022 GMC New Sierra Denali 1500 — GM Fleet Order Guide (Wayback Machine capture), page 1: model list and the guide menu (New Sierra/Denali 1500, Sierra/Denali 1500 Limited); no codes, cited for the overview only — https://web.archive.org/web/20220517182524/https://www.gmfleetorderguide.com/NASApp/domestic/proddesc.jsp?year=2022&butID=1&regionID=1&divisionID=2&vehicleID=22364&type=0
• gmc/2023-gmc-sierra-denali-1500-fleet-order-guide-wayback.txt — 2023 GMC Sierra Denali 1500 — GM Fleet Order Guide (Wayback Machine capture), page 1: model list only; no codes, cited for the overview only — https://web.archive.org/web/20230205035932/https://www.gmfleetorderguide.com/NASApp/domestic/proddesc.jsp?year=2023&butID=1&regionID=1&divisionID=2&vehicleID=22449&type=0

Other sources

• NICB VIN manuals in the repository (read 2026-10-14; no web request): docs/reference/nicb/nicb2019-gm.txt pp.176–177 (2019 Sierra and the K2XX Sierra Limited), nicb2020-gm.txt pp.168–169, nicb2021-gm.txt pp.174–175, nicb2022-gm.txt pp.166–168 (2022 Sierra and Sierra Limited, 2021 column with Elevation (3VL)), nicb2023-gm.txt p.159, nicb2024-gm.txt p.167, nicb2025-gm.txt p.159 and nicb2026-gm.txt p.155 (series by trim and drive); the GMC engine RPO tables of the 2025 manual (p.164) and the 2026 manual (p.159), which list L3B, L84, L87 and LZ0.
• No web page was read: on 2026-10-14 the Firecrawl CLI had no credits left, so the GM Authority corroboration sample was checked against repository sources only (the merged Silverado T1XX, Sierra HD T1XX, Yukon T1XX and Canyon docs and their recorded GM Authority findings).