Editing General Motors GMT platform

{{Short description|Automobile platform}}
{{Use mdy dates|date=May 2020}}
'''GMT'''  ('''General Motors Truck''') is a nomenclature used by General Motors to designate multiple vehicle platforms. In use since the early 1980s, the GMT nomenclature is used for light trucks, full-size SUVs, and vans, along with several medium-duty trucks. With only a few exceptions, nearly all GMT vehicles use body-on-frame construction, along with rear-wheel drive (or all-wheel drive) powertrain configurations.

== Primary applications ==
Primary applications of the platform – those that are equivalent in basic RWD/frame structure to each other – existed from 1981 to 1989, and again since 2018.

=== Light trucks and SUVs ===
Pickups and SUVs have been the main vehicles underpinned by GMT platforms, being involved for the entirety of the platform's existence.

==== Fullsize ====

# '''[[GMT400]]''' – [[Chevrolet C/K]] and variants, 1988 – 2002
# '''[[GMT800]]''' – [[Chevrolet Silverado]] and variants, 1999 – 2007
# '''[[GMT900]]''' – Chevrolet Silverado and variants, 2007 – 2014
# '''[[GMT K2XX|GMTK2XX]]''' – Chevrolet Silverado and variants, 2014 – 2019
# '''[[GMT T1XX platform|GMTT1XX]]''' – Chevrolet Silverado and variants, 2019–present

==== Midsize ====

# '''GMT325''' – [[Chevrolet S-10]] and truck rebadgings, 1982 – 2012
# '''GMT330''' – [[Chevrolet S-10 Blazer]] and SUV rebadgings, 1983 – 2012
# '''GMT355''' – [[Chevrolet Colorado#First generation (2004)|First-gen. Chevrolet Colorado]] and truck rebadgings, 2004 – 2012
# '''[[GMT360]]''' – [[Chevrolet TrailBlazer]] and rebadgings, 2002 – 2009
# '''GMT700''', later '''GMT31XX''' – [[Chevrolet Colorado#Second generation (RG; 2011)|Second-gen. Chevrolet Colorado]], 2012–present
# '''GMT700''', later '''GMT31XX''' – [[Chevrolet TrailBlazer (SUV)#Second_generation_(RG;_2011)|Second-gen. Chevrolet TrailBlazer SUV]], 2012–present

=== Hummer ===
In contrast to the Hummer H1–designed and assembled by AM General, the [[Hummer H2]] and [[Hummer H3]] were developed by GM, receiving their own platform designations. Designated the '''GMT825''', the H2 was derived from the GMT820 (Chevrolet Tahoe/GMC Yukon), with its own midsection frame design and a rear frame shared with the 2500-series GMT800 pickup trucks.<ref>{{cite web|last=Clavey |first=William |title=The Hummer H2 Is A Grand And Opulent Bad Idea |url= http://jalopnik.com/the-hummer-h2-is-a-grand-and-opulent-bad-idea-1796613645 |website=Jalopnik |date=12 July 2017 |access-date=25 September 2017}}</ref>

The H3 SUV was designated the '''GMT345''', a close variant of the GMT355 (Chevrolet Colorado/GMC Canyon). The 2009-2010 H3T pickup truck was designated as the '''GMT745''', adopting a nomenclature closer in line with the GMT700 used by the later second-generation Colorado/Canyon.

=== Vans ===
The 1996 [[Chevrolet Express|Chevrolet Express/GMC Savana]] replaced the previous G-series Van/Vandura, adopting the '''GMT600''' designation. As part of a model update and revision for 2003, GM changed the Express/Savana to '''GMT610''', which remains in use. The model line competes with the [[Ford Transit]], and [[Ford E-Series]] (dependent on configuration), [[Mercedes-Benz Sprinter|Mercedes-Benz/Freightliner Sprinter]], [[Dodge Ram Wagon]], and the [[Ram ProMaster]] (cargo van only).

=== Medium trucks ===
For 1990, the [[Chevrolet Kodiak|Chevrolet Kodiak/GMC TopKick]] medium-duty trucks adopted the '''GMT530''' designation (sharing the cab of the GMT400 trucks). For 2003, the line was redesigned, becoming the '''GMT560''' platform (sharing a version of the GMT610 cab). After the 2009 model year, General Motors ended medium-duty truck production.

Since 2018, a medium-duty version of the GMTK2XX has been produced in a joint venture with Navistar International.

== Other applications ==
While the aforementioned platforms are the ones model commonly referred to as GMT platforms, there have been other instances of the name being applied which are not for RWD and/or body-on-frame vehicles.

===MPVs===
{{Main|GM U platform|GM Delta platform}}
For 1990, GM unveiled its first [[minivan]]s, all of which were underpinned by the [[GM U platform#1st Generation|first generation of the U platform]]. This platform was given the alternate name of '''GMT199''' shortly thereafter, beginning the pattern of expanded use for the GMT platform name. This pattern was kept for the 1996 [[GM U platform#2nd Generation|second-generation]] and 2005 [[GM U platform#3rd Generation|third-generation GM minivans]], called the '''GMT200''' and '''GMT201''' platforms, respectively. With the 2010 introduction of the [[GM U platform#4th Generation|fourth-generation U platform]], the designation GMT510 was planned for use. However, all of the GM minivans (save for the China-exclusive [[Buick GL8]]) were dropped, ergo the name went unused.

For its production from 2006 to 2011, the compact [[Station wagon|wagon]]-bodied [[Chevrolet HHR]] rode on the Delta platform. Despite this, it was internally given the designation of '''GMT001'''.

===Crossovers===
{{Main|GM Lambda platform|GM Sigma platform|GM Theta platform}}In 2001 and 2002, the [[Pontiac Aztek]] and [[Buick Rendezvous]] were introduced, respectively. These were built upon a shortened version of the U platform which underpinned GM's minivans. As such, they were given the '''GMT 250''' and '''GMT 257''' names respectively. For 2003, [[Cadillac]] released their first crossover, the Sigma-based [[Cadillac SRX#First generation (2004)|first-generation SRX]]. Being a luxury model, it was given the alternate platform code of '''GMT265'''. The [[Cadillac SRX#Second generation (2011)|successive generation SRX]], on an [[GM Theta platform#Theta Premium|entirely different platform]], was called '''GMT166'''. The related [[Saab 9-4X]] was called '''GMT168'''. 

In 2004, with the release of the [[Chevrolet Equinox#First generation (2005)|first-generation Chevrolet Equinox]], the '''GMT 191''' name was internally used to refer to it. Consequently, the '''GMT190''' name was retroactively applied to the [[Chevrolet Tracker (Americas)#Second generation|second-generation Chevrolet Tracker]], which could be considered one of the Equinox's predecessors. '''GMT192''' was used to refer to the [[Pontiac Torrent]], which was released a year later. The next application of this platform was called '''GMT193''', used exclusively for the [[Suzuki XL-7#Second generation (XL7; 2006)|second-generation Suzuki XL7]], which was discontinued in 2009. The 2010 [[Chevrolet Equinox#Second generation (2010)|second-generation Chevrolet Equinox]], was 
called '''GMT172'''. The related [[GMC_Terrain#First_generation_(2010)|GMC Terrain]] was called '''GMT177'''. In 2017, the [[Chevrolet Equinox#Third generation (2018)|third-generation Equinox]] went on sale, though it did not use an alternate GMT designation for its platform, and simply used the latest Delta platform variant [[GM Delta platform#D2XX/D2UX|D2XX]]. This decision, along with the equivalent shifts for the Enclave and Traverse models in the same year, made for the end of the use of GMT-platform designations for models that are not RWD and body-on-frame.

For 2007, the release of the new [[Saturn Outlook]] and [[GMC Acadia]], as well as the Lambda platform, occurred. Lambda itself was called the '''GMT960''' series, with each individual vehicle it underpinned getting an alternate GMT-designation as well. The Outlook was given '''GMT966''', and the Acadia '''GMT968'''. The next year, the [[Buick Enclave]] and [[Chevrolet Traverse]] were introduced, and given '''GMT967''' and '''GMT561''', respectively. Despite numerical similarity in nomenclature of these platforms to the GMT900/GMT560 platforms, there was no further relation, as these models were actually more similar to the other GM crossover platforms.
{| class="wikitable mw-collapsible"
|+''[[General Motors|GM]] GMT platform application timeline''
| colspan="4" rowspan="2" |
! colspan="9" |1980s
! colspan="10" |1990s
! colspan="10" |2000s
! colspan="10" |2010s
! colspan="6" |2020s
|-
!1
!2
!3
!4
!5
!6
!7
!8
!9
!0
!1
!2
!3
!4
!5
!6
!7
!8
!9
!0
!1
!2
!3
!4
!5
!6
!7
!8
!9
!0
!1
!2
!3
!4
!5
!6
!7
!8
!9
!0
!1
!2
!3
!4
!5
|-
! rowspan="8" |truck
! colspan="3" rowspan="2" |[[Medium-duty truck|medium-duty]]
| colspan="9" |
! colspan="13" |[[Chevrolet Kodiak#Second generation (1990–2002)|530]]
! colspan="7" |[[Chevrolet Kodiak#Third generation (2003–2009)|560]]
| colspan="16" |
|-
| colspan="10" |
! colspan="12" |[[GMT400|455]]
| colspan="23" |
|-
! rowspan="6" |[[Light duty truck|light-duty]]
! rowspan="2" |[[Full-size car|fullsize]]
! rowspan="1" |[[sport utility truck|SUT]]
| colspan="21" |
! colspan="5" |[[Chevrolet_Avalanche#First_generation_(2001–2006)|805]]/[[Cadillac_Escalade#2002–2006|806]]
! colspan="7" |[[Chevrolet_Avalanche#Second_generation_(2007–2013)|941]]/[[Cadillac_Escalade#2007–2013|946]]
| colspan="12" |
|-
!pickup
| colspan="7" |
! colspan="11" |[[GMT400|400/480]]
! colspan="8" |[[GMT800|800/880]]
! colspan="7" |[[GMT900|900/910]]
! colspan="5" |[[GMT K2XX|K2XX]]
! colspan="7" |[[GMT T1XX platform|T1XX]]
|-
! colspan="2" |[[roadster pickup]]
| colspan="22" |
! colspan="4" |[[Chevrolet SSR|368]]
| colspan="19" |
|-
! rowspan="7" |[[Mid-size car|midsize]]
! rowspan="3" |pickup
| colspan="28" |
! colspan="2" |[[Hummer H3#H3T|745]]
| colspan="15" |
|-
| colspan="1" |
! colspan="12" |[[Chevrolet_S-10#First_generation_(1982)|325 (Gen 1)]]
! colspan="11" |[[Chevrolet_S-10#Second_generation_(1994)|325 (Gen 2)]]
| colspan="23" |
|-
| colspan="23" |
! colspan="9" |[[Chevrolet Colorado#First generation (2004)|355]]
| colspan="2" |
! colspan="8" |[[Chevrolet_Colorado#North_America_2|700/31XX]]
! colspan="3" |[[Chevrolet_Colorado#Third_generation_(2023)|31XX-2]]
|-
! rowspan="21" |[[Sport utility vehicle|SUV]]
! rowspan="10" |[[body-on-frame]]
! rowspan="3" |standard
| colspan="23" |
! colspan="2" |[[GMC Envoy#Envoy XUV|305]]
! colspan="5" |[[Hummer H3|345]]
| colspan="15" |
|-
| colspan="2" |
! colspan="12" |[[Chevrolet_S-10_Blazer#First_generation_(1983–1994)|330 (Gen 1)]]
! colspan="11" |[[Chevrolet_S-10_Blazer#Second_generation_(1995)|330 (Gen 2)]]
| colspan="20" |
|-
| colspan="21" |
! colspan="8" |[[GMT360|360]]
| colspan="17" |
|-
! rowspan="2" |extended
| colspan="21" |
! colspan="5" |[[GMT360#GMT 370|370]]
| colspan="19" |
|-
! rowspan="5" |fullsize
| colspan="11" |
! colspan="8" |[[Chevrolet Suburban#Eighth generation (1992)|410/425]]
! colspan="7" |[[Chevrolet Suburban#Ninth generation (2000)|830]]
! colspan="8" |[[Chevrolet Suburban#Tenth generation (2007)|931/932]]
! colspan="5" |[[GMT K2XX|K2YC/K2YG]] 
! colspan="6" |[[GMT T1XX platform|T1YC/T1YG]] 
|-
! rowspan="1" |extended luxury
| colspan="22"|
! colspan="4" |[[Cadillac_Escalade#Second_generation_(2002)|830]]
! colspan="8" |[[Cadillac_Escalade#Third_generation_(2007)|936]]
! colspan="5" |[[Cadillac_Escalade#Fourth_generation_(2015)|K2YL]] 
! colspan="6" |[[Cadillac_Escalade#Fifth_generation_(2021)|T1YL]] 
|-
! rowspan="1" |standard size
| colspan="11" |
! colspan="8" |[[Chevrolet Tahoe#First generation (1992)|415/420/430]]
! colspan="7" |[[Chevrolet Tahoe#Second generation (2000)|820]]
! colspan="8" |[[Chevrolet Tahoe#Third generation (2007)|921/922]]
! colspan="5" |[[GMT K2XX|K2UC/K2UG]] 
! colspan="6" |[[GMT T1XX platform|T1UC/T1UG]] 
|-
! rowspan="1" |standard size luxury
| colspan="18" |
! colspan="2" |[[Cadillac_Escalade#First_generation_(1999)|435]]
| colspan="1" |
! colspan="5" |[[Cadillac_Escalade#Second_generation_(2002)|820]]
! colspan="8" |[[Cadillac_Escalade#Third_generation_(2007)|926]]
! colspan="5" |[[Cadillac_Escalade#Fourth_generation_(2015)|K2UL]] 
! colspan="6" |[[Cadillac_Escalade#Fifth_generation_(2021)|T1UL]] 
|-
! rowspan="1" |off-road
| colspan="22" |
! colspan="7" |[[Hummer H2|825]]
| colspan="16" |
|-
! colspan="2" |compact
| colspan="18" |
! colspan="6" |[[Chevrolet Tracker (Americas)#Second generation|190]]
| colspan="21" |
|-
! rowspan="11" |[[Crossover (automobile)|crossover]]
! rowspan="2" |compact
! rowspan="5" |standard
| colspan="21" |
! colspan="6" |[[Saturn_Vue#First_generation_(2002)|315]]
! colspan="3" |[[Saturn_Vue#Second_generation_(2008)|319]]
| colspan="15" |
|-
| colspan="24" |
! colspan="5" |[[Chevrolet Equinox#First_generation_(2005)|191]]/[[Pontiac Torrent|192]]
! colspan="8" |[[Chevrolet Equinox#Second generation (2010)|172]]/[[GMC_Terrain#First_generation_(2010)|177]]
| colspan="8" |
|-
! rowspan="5" |midsize
| colspan="26" |
! colspan="3" |[[Suzuki XL-7#Second generation (XL7; 2006)|193]]
| colspan="16" |
|-
| colspan="20" |
! colspan="5" |[[Pontiac Aztek|250]]
| colspan="20" |
|-
| colspan="21" |
! colspan="6" |[[Buick Rendezvous|257]]
| colspan="19" |
|-
! rowspan="2" |[[Luxury vehicle|luxury]]
| colspan="23" |
! colspan="6" |[[Cadillac SRX#First generation (2004)|265]]
! colspan="7" |[[Cadillac SRX#Second generation (2011)|166]]
| colspan="9" |
|-
| colspan="30" |
! colspan="2" |[[Saab 9-4X|168]]
| colspan="14" |
|-
! colspan="2" rowspan="7" |fullsize
| colspan="26" rowspan="2" |
! colspan="11" |[[GMC Acadia#First generation (2007–2016)|968]]
| colspan="8" |
|-
! colspan="4" |[[Saturn Outlook|966]]
| colspan="15" |
|-
| colspan="27" |
! colspan="10" |[[Buick Enclave#First generation (2008)|967]]
| colspan="8" |
|-
| colspan="28" |
! colspan="9" |[[Chevrolet Traverse#First generation (2009–2017)|561]]
| colspan="8" |
|-
! rowspan="4" |van
!cargo
| colspan="15" |
! colspan="7" |[[Chevrolet Express#1996|600]]
! colspan="23" |[[Chevrolet Express#2003|610]]
|-
! rowspan="3" |[[Minivan|MPV]]
| colspan="9" |
! colspan="7" |[[GM U platform#First generation|199]]
! colspan="9" |[[GM U platform#Second generation|200]]
| colspan="20" |
|-
| colspan="24" |
! colspan="5" |[[GM U platform#3rd Generation|201]]
|-
! colspan="2" |compact
| colspan="25" |
! colspan="6" |[[Chevrolet HHR|001]]
| colspan="14" |
|}
==References==
{{reflist}}

{{General Motors platforms}}

{{General Motors}}

[[Category:General Motors platforms|GMT]]