DD8 Factory-verified

GMC · Regular Production Option

Mirror, inside rearview, auto-dimming

Years 1998–99, 2001–04, 2009, 2014–27 Models 22 Factory citations 78

Also described as Mirror, inside rearview, light sensitiveMirror, inside rearview, light sensitive, requires roof console and DK2Inside rearview mirror, auto-dimming

Also documented for Buick Cadillac Chevrolet Oldsmobile Pontiac Saturn

Documented applications

Acadia — first generation, Lambda (2007–2017)

2009, 2014–2016 Factory-verified

the 2014–2016 guides read inside rearview mirror, auto-dimming.

GM factory document — 2009 gmc acadia 2wd rpo code list, p.1.
GM factory document — 2014 gmc acadia fleet order guide wayback, p.2.
GM factory document — 2015 gmc acadia fleet order guide wayback, p.2.
GM factory document — 2016 gmc acadia fleet order guide wayback, p.2.

Acadia — Second generation (C1XX) (2017–2023)

2017–2019 Factory-verified

2019 guide: SLT-1, SLT-2, Denali: S

GM factory document — 2017 gmc acadia order guide copy gm authority, p.3, p.19.
GM factory document — 2018 gmc acadia order guide copy gm authority, p.4, p.25.
GM factory document — 2019 gmc acadia order guide copy gm authority, p.4, p.27.

Acadia — Third generation (2024–2027)

2025 Factory-verified

AT4, Denali: S; Elevation: O

GM factory document — 2025 gmc acadia fleet order guide, p.5.

Canyon — Second generation (GMT31XX) (2015–2022)

2015–2017, 2019, 2021–2022 Factory-verified

2015–2016: SLE, SLT: S; SL, Canyon: not offered; 2021: Elevation, AT4, Denali: S; Elevation Standard: not offered; the upfitter lists read light sensitive

GM factory document — 2015 gmc canyon fleet order guide wayback, p.2.
GM factory document — 2016 gmc canyon fleet order guide wayback, p.5.
GM factory document — 2017 chevrolet canyon colorado electrical body builders manual service manual 2017 en us, p.9.
GM factory document — 2019 chevrolet 19 coloradocanyon body builder sm u 2018aug01 1, p.10.
GM factory document — 2021 gmc canyon fleet order guide wayback, p.1.
GM factory document — 2022 chevrolet 22 canyon colorado electrical body builder sm en us 2021oct15, p.10.

Canyon — Third generation (VSS-T) (2023–2027)

2023–2027 Factory-verified

2025: Elevation: O; AT4, Denali: included in a package; 2026–2027: Elevation: O; AT4, AT4X, Denali: included in a package

GM factory document — 2023 gmc 23canyon electrical body builder 2023march13, p.10.
GM factory document — 2024 gmc 24 canyon electrical body builder manual 2023oct04, p.11.
GM factory document — 2025 gmc canyon fleet order guide, p.9.
GM factory document — 2026 gmc canyon fleet order guide, p.12.
GM factory document — 2027 gmc canyon fleet order guide, p.12.

Jimmy — second generation (1995–2001)

1998, 1999, 2001 Factory-verified

The 2001 list drops the requirement wording

GM factory document — 1998 gmc jimmy 4wd rpo code list, p.1.
GM factory document — 1999 gmc jimmy 4wd rpo code list, p.1.
GM factory document — 2001 gmc jimmy 4wd rpo code list, p.1.

Sierra EV — BT1 (2024–2027)

2026–2027 Factory-verified

2026: S in 3SB, 5SB; □ (included in equipment group, upgradeable) in 3SC, 4SC, 5SC; not offered in 4SD, 5SD; 2027: S in 3SB; □ (included in equipment group, upgradeable) in 3SC, 4SC, 5SC; not offered in 4SD, 5SD

GM factory document — 2026 gmc sierra ev fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc sierra ev fleet order guide, p.5.
GM factory document — 2027 gmc sierra ev fleet order guide rpo codes, p.1.
GM factory document — 2027 gmc sierra ev fleet order guide, p.5.

Sierra 1500 — Next-Generation (2027)

2027 Factory-verified

Pro, AT4X, Denali, Denali Ultimate: not offered; Elevation 3VL: included in the trim group; Elevation 3SB, AT4: included in the trim group, upgradeable

GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide, p.14.
GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

Sierra — GMT900 (2007–2013)

2009 Factory-verified

GM factory document — 2009 gmc sierra 2wd rpo code list, p.1.

Sierra HD — GMT900 (2007–2014)

2009, 2014 Factory-verified

the 2014 guides call it auto-dimming

GM factory document — 2009 gmc sierra 2wd rpo code list, p.1.
GM factory document — 2014 gmc sierra 2500hd fleet order guide wayback, p.2.
GM factory document — 2014 gmc sierra 3500hd fleet order guide wayback, p.2.

Sierra HD — K2XX (2015–2019)

2015, 2018–2019 Factory-verified

2018: GM's 2018 Sierra 2500HD order guide

GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.2.
GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.5.

Sierra HD — T1XX (2020–2027)

2025–2027 Factory-verified

GM factory document — 2025 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2027 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.

Sierra — K2XX (2014–2019)

2014, 2016–2018 Factory-verified

GM factory document — 2014 gmc sierra 1500 fleet order guide wayback, p.2.
GM factory document — 2016 gmc sierra 1500 fleet order guide wayback, p.2.
GM factory document — 2017 chevrolet sierra silverado electrical body builders manual service manual 2017 en us, p.17.
GM factory document — 2018 gmc sierra 1500 order guide copy gm authority, p.88.

Sierra — T1XX (2019–2026)

2019–2020, 2022–2026 Factory-verified

GM factory document — 2019 gmc 19 sierra 1500 body builder feb 20, p.10.
GM factory document — 2020 gmc 20 sierra 1500 electrical body buil 1, p.11.
GM factory document — 2022 gmc 22 sierra 1500 new electrical body builder sm en us 2022jul20, p.11.
GM factory document — 2023 gmc 23 sierra 1500 electrical body builder sm en us 2022oct12, p.10.
GM factory document — 2024 gmc 24 sierra 1500 sm electrical body builder esid 23dec12, p.12.
GM factory document — 2025 gmc my25 sierra 1500 electrical bbm, p.10.
GM factory document — 2025 gmc sierra 1500 retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

Sonoma — second generation (1994–2004)

1998–1999, 2001–2004 Factory-verified

The 2001 list drops the requirement wording. The 2002–2004 lists read as the 2001 list.

GM factory document — 1998 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 1999 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2001 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2002 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2003 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2004 gmc sonoma pickup 4wd rpo code list, p.1.

Terrain — First generation (2010–2017)

2016–2017 Factory-verified

S on all trims

GM factory document — 2016 gmc terrain fleet order guide wayback, p.2.
GM factory document — 2017 gmc terrain fleet order guide wayback, p.2.

Terrain — Second generation (D2XX) (2018–2024)

2019 Factory-verified

SLE, SLE Diesel, SLT, SLT Diesel, Denali: S

GM factory document — 2019 gmc terrain order guide copy gm authority, p.4, p.33.

Yukon — GMT900 (2007–2014)

2009 Factory-verified

GM factory document — 2009 gmc yukon 2wd rpo code list, p.1.

Yukon — K2XX (2015–2020)

2015–2018 Factory-verified

SLE: part of PCI (2018 also PDU); SLT, Denali: S; 2018 from GM's 2018 Yukon order guide

GM factory document — 2015 gmc yukon denali fleet order guide wayback, p.2.
GM factory document — 2016 gmc yukon denali fleet order guide wayback, p.2.
GM factory document — 2017 chevrolet escalade escalade esv suburban tahoe yukon yukon xl electrical body builders manual service manual 2017 en us 1, p.17.
GM factory document — 2018 gmc yukon order guide copy gm authority, p.24.

Yukon — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: Elevation, AT4, Denali: S

GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.10.
GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.10.
GM factory document — 2025 gmc new yukon denali fleet order guide, p.4.
GM factory document — 2026 gmc yukon denali fleet order guide, p.4.
GM factory document — 2027 gmc yukon fleet order guide, p.4.

Yukon XL — K2XX (2015–2020)

2015–2017 Factory-verified

SLE: A, only with PCI

GM factory document — 2015 gmc yukon xl denali fleet order guide wayback, p.2.
GM factory document — 2016 gmc yukon xl denali fleet order guide wayback, p.2.
GM factory document — 2016 chevrolet escalade escalade esv suburban tahoe yukon yukon xl electrical body builders manual service manual 2016 en us, p.7.
GM factory document — 2017 chevrolet escalade escalade esv suburban tahoe yukon yukon xl electrical body builders manual service manual 2017 en us 1, p.17.

Yukon XL — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: Elevation, AT4, Denali: S

GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.10.
GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.10.
GM factory document — 2025 gmc new yukon xl denali fleet order guide, p.4.
GM factory document — 2026 gmc yukon xl denali fleet order guide, p.4.
GM factory document — 2027 gmc yukon xl fleet order guide, p.4.

This page aggregates every documented appearance of DD8 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.