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The T1XX (5th Generation) GMC Sierra 1500 Clubhouse

GMC Sierra 1500 T1XX (2019-2026) Owner's Hub

The T1XX Sierra 1500 (2019-present) is GMC's dressed-up half-ton: MultiPro tailgate, optional carbon-fiber CarbonPro bed, and a 2022 refresh that finally fixed the cheap interior. Five engines ran the generation: a 2.7L turbo four, the 4.3L V6 (2019-2021 only), the 5.3L and 6.2L V8s, and the 3.0L Duramax inline-six diesel. The V8s and their cylinder-deactivation lifters are the story: collapsed lifters, and on 2021-2024 6.2L trucks a rod-bearing recall (25V-274) that can seize the engine. Buy one with the recall work documented and a real maintenance record and it is a genuinely good truck.

Production
2019-2026
Engines
2.7L · 4.3L · 3L · 5.3L · 6.2L
Max tow
13,300lb
Configure your truck
Year
Cab
Trim

What your Sierra 1500 takes

The parts and fluids that fit this generation. Specs we publish are confirmed against two independent sources; the rest fill in as we verify them.

  • Wiper blades22" driver · 22" passenger✓ VerifiedView
  • Engine oil5W-30 (6 qt) · 0W-20 (7 qt) · 0W-20 (8 qt)✓ VerifiedView
  • Spark plugsLV3: 41-114 · L84: 41-114 · L87: 41-114 · L3B: 41-106IP✓ VerifiedView
  • Tire pressure32 / 35 psi (front / rear)✓ VerifiedView
  • Key fob batteryCR2032 (remote) · CR2032 (smart)✓ VerifiedView
  • Differential fluidRear: 75W-85 GL-5 (GM Original Equipment, High Efficiency)✓ VerifiedView
  • Serpentine beltLV3: 4PK870 · LM2/LZ0: 6PK1900 · L84: 4PK870 · L87: 4PK870✓ VerifiedView
  • Wheel fitment17x8 ET24✓ VerifiedView
  • ThermostatLV3: 187°F · L84: 187°F · L87: 187°F✓ VerifiedView
  • Headlight bulbsH11 low · 9005 highFrom owner's manualShop
  • CoolantDEX-COOL (GM GMW3420)From owner's manualShop
  • Transmission fluidL3B: DEXRON HP · L87: DEXRON ULVFrom owner's manualShop
  • Oil filterParts in catalogShop
  • Engine air filterParts in catalogShop
  • Cabin air filterParts in catalogShop
  • BatteryParts in catalogShop
  • Brake padsParts in catalogShop
  • Brake rotorsParts in catalogShop
  • Tire sizeNot catalogued yetFind yours soon
  • Brake fluidNot catalogued yetFind yours soon
  • A/C refrigerantNot catalogued yetFind yours soon
  • Fuel filterNot catalogued yetFind yours soon
  • Power steering fluidElectric power steering — no fluid.N/A

Floor mats

Our top custom-fit pick for the GMC Sierra 1500 is the Husky Liners Weatherbeater Floor Mats 1st & 2nd rows.

Floor mats for the GMC Sierra 1500

Heritage · T1XX (5th Generation) Sierra 1500

2019-2026
  1. 1999

    Sierra nameplate arrives

    GMC splits its full-size trucks off the shared C/K name and badges them Sierra for 1999, on the new GMT800 platform.

  2. 2014

    K2XX generation

    The fourth-generation Sierra brings the EcoTec3 engine family, the 4.3L V6, and 5.3L and 6.2L V8s that carry into the next truck.

  3. 2019

    T1XX launches

    All-new platform, the six-position MultiPro tailgate, the industry-first carbon-fiber CarbonPro bed, and the 2.7L turbo four.

  4. 2022

    Mid-cycle refresh

    A long-overdue interior overhaul, Super Cruise hands-free driving, and the hardcore AT4X and luxury Denali Ultimate trims.

Last verified: July 2026.

The GMC Sierra 1500 on the T1XX platform (2019-present) is the truck GMC uses to charge Denali money for a Chevrolet Silverado. Same bones, same engines, dressier skin, and a couple of genuinely useful ideas the Silverado did not get first: the six-position MultiPro tailgate and the optional carbon-fiber CarbonPro bed. It launched in 2019 with a cheap interior that the 2022 refresh finally fixed, and it is a good truck once you understand which engine you are buying and what it can go wrong with.

Should you buy one

A used T1XX Sierra holds value hard, so you are not going to steal one. What you are buying into is GM's half-ton drivetrain, which is proven and cheap to service, wrapped in a nicer cabin than the Chevy. The catch is the V8 lifter story below. Sort that out and the rest of the truck is easy to own.

  • Good for: towing up to about 13,300 lb, daily driving with weekend truck duty, anyone who wants a work truck that does not feel like one, and diesel buyers who want highway mileage in a half-ton.
  • Bad for: buyers who want the cheapest possible half-ton (a base Silverado does the same work for less), or anyone unwilling to check a recall record before signing.
  • Skip if: the 6.2L has no proof the 25V-274 recall was performed, or any DFM V8 has a cold-start tick that will not clear.

The engines, honestly

Five engines ran this generation, and they are not the same conversation.

The 5.3L L84 is the volume V8 and the one most owners should buy. It makes 355 hp, tows well, and parts are everywhere. The 6.2L L87 is the strongest gas engine at 420 hp and the one that hauls the heaviest trailers, but it carries the rod-bearing recall on 2021-2024 trucks. Both V8s use Dynamic Fuel Management, and both can suffer collapsed lifters. That is the single most important thing to inspect on any gas Sierra.

The 3.0L Duramax inline-six diesel is the quiet standout. It returns highway mileage no gas half-ton matches, tows smoothly, and sidesteps the DFM lifter problem entirely because it has no cylinder deactivation. It does take a diesel-specific dexosD 0W-20 oil and a Group 49 battery, so budget for those. The 2.7L turbo four is fine for a light daily driver and got a useful torque bump to 430 lb-ft in the 2022 refresh. The 4.3L V6 was the fleet base engine and was dropped after 2021; there is no reason to seek one out.

The maintenance that actually matters

This is the real-world cadence, not the dealer upsell sheet.

  • Every oil change: match the oil to the engine. dexos1 0W-20 for the 5.3L and 6.2L, dexos1 5W-30 for the 2.7L turbo, dexosD 0W-20 for the diesel. The 2.7L and diesel share the PF66 filter; the V8s and the 4.3L use the PF63.
  • Listen at cold start: a lifter tick on a DFM V8 is not normal. Catch it early, before it becomes a camshaft.
  • Every 22,500 miles or annually: cabin air filter (ACDelco CF185 family) behind the glovebox, and inspect the engine air filter (ACDelco A3244C).
  • Around 97,500 miles: spark plugs on the gas engines (ACDelco 41-114 iridium on the V8s and 4.3L). The diesel has no service plugs.
  • At 150,000 miles: first coolant change (DEX-COOL, orange, GM GMW3420). Do not mix it with green or pink coolant.
  • By spec, not by feel: the 10-speed uses DEXRON ULV and the early 8-speed uses DEXRON HP; they are not interchangeable, and neither is DEXRON VI.

Skip the dealer's throttle-body and induction "services" on a truck under 100,000 miles. They do less than the maintenance above and cost more.

Common problems, ranked by severity

  1. 1. 6.2L L87 rod-bearing failure and engine seizure

    catastrophic

    Supplier defects in rod bearings and out-of-spec cranks can spin a bearing and lock the engine while driving. NHTSA recall 25V-274 covers roughly 153,000 GM trucks; the remedy is an inspection plus a switch to heavier oil, or a full engine replacement if damage is found. Get proof the recall work was performed before buying a 2021-2024 6.2L.

    Years affected: 2021-2024

  2. 2. AFM/DFM lifter collapse (5.3L L84 and 6.2L L87)

    expensive

    The cylinder-deactivation lifters can collapse, causing a misfire, a persistent tick or knock, and often a full camshaft-and-lifter job. Engines built around late 2020 through early 2021 cluster worst, with some failing well under 20,000 miles. A cold-start tick that does not clear is the tell.

    Years affected: 2019-2022

  3. 3. Diesel transmission control-valve failure

    expensive

    On 3.0L Duramax trucks the automatic-transmission control valve can fail and lock the rear wheels while driving. NHTSA recall 24V-797 covers it, with a follow-up re-fix under 26V-083. Confirm the latest remedy was applied on any diesel from these years.

    Years affected: 2020-2022

  4. 4. 10-speed harsh shifts and torque-converter shudder

    Minor

    The 10L80 automatic can shudder at a steady 40-70 mph and bang the cold 1-2 upshift, traced to valve-body pressure drift and the torque converter. GM addressed most cases with a fluid-flush bulletin and revised transmission fluid.

    Years affected: 2019-2020

  5. 5. Infotainment and electrical gremlins

    Minor

    Screen freezes and reboots, dropped audio and HVAC control, and false StabiliTrak or trailer-brake warnings (TSB 23-NA-022). A body-control-module glitch can also drain the battery overnight. Mostly software and connector fixes, rarely catastrophic.

    Years affected: 2020-2024

Year-by-year notes

2019
T1XX launch. MultiPro six-position tailgate, optional CarbonPro carbon-fiber bed, Denali flagship, and the new AT4 off-road trim. Engines at launch: 4.3L V6, 2.7L turbo, 5.3L and 6.2L V8s.
2020
3.0L Duramax LM2 inline-six diesel arrives (277 hp, 460 lb-ft).
2021
Final model year for the 4.3L V6; it is dropped for 2022. Wireless Apple CarPlay and Android Auto standard on most trims.
2022
Mid-cycle refresh: new 13.4-inch screen, 12.3-inch digital cluster, head-up display. AT4X and Denali Ultimate debut, Super Cruise offered. 2.7L torque rises to 430 lb-ft. Old body sold alongside as the 2022 Sierra Limited.
2023
Diesel LZ0 replaces the LM2 (305 hp, 495 lb-ft). Refreshed interior fully rolled out across trims.
2024
Lineup settles on the 2.7L, 5.3L, 6.2L and 3.0L LZ0 diesel. Super Cruise availability expanded.
2025
Adaptive cruise standard across trims; Super Cruise standard on Denali Ultimate.
2026
Minor update: new colors, optional sport exhaust, carryover powertrains. Max tow rated to 13,300 lb.

Trim decoder

  • Pro (2019-2026)

    Fleet and work-truck base. Vinyl or cloth, steel wheels, halogen headlamps. The hose-it-out trim.

  • SLE (2019-2026)

    The volume retail trim. Cloth, alloy wheels, still halogen headlamps.

  • Elevation (2019-2026)

    Monochrome-look appearance package on the SLE body. Halogen headlamps.

  • SLT (2019-2026)

    First trim with leather and standard full-LED headlamps.

  • AT4 (2019-2026)

    Off-road trim launched with the generation: 2-inch factory lift, locking rear diff, skid plates, Rancho shocks.

  • AT4X (2022-2026)

    Added in the 2022 refresh. Multimatic DSSV dampers, front and rear lockers. The serious off-roader.

  • Denali (2019-2026)

    Chrome-and-leather flagship. Standard 6.2L availability, full LED, premium interior.

  • Denali Ultimate (2022-2026)

    Top of the range from the 2022 refresh. Full-grain leather, open-pore wood, standard Super Cruise.

What owners actually buy

Hand-picked from the CarCareTruth catalog, ordered to match the spec card above. Every score is health + chemistry + effectiveness, in one number.

Engine oil (0W-20 V8, 5W-30 turbo, dexosD diesel)

Oil filter (PF66 turbo/diesel, PF63 V8)

Engine air filter (ACDelco A3244C)

Cabin air filter (ACDelco CF185)

Spark plugs (ACDelco 41-114, 0.040-inch gap)

Brake fluid (DOT 3)

Battery (Group 94R gas, Group 49 diesel)

The shortlist

One top pick per category, fitting your Sierra 1500

Skip the comparison. The Best Of page shows the single highest-scored CarCareTruth product in every category that fits the t1xx (5th generation) Sierra 1500.

See the Best Of →

Sources