25V-274
6.2L V8 Connecting Rod / Crankshaft - engine failure
2021-2024 Tahoe with the 6.2L L87 V8 only: connecting-rod and/or crankshaft manufacturing defects can damage and destroy the engine. Dealer inspects and repairs or replaces it; trucks that pass get higher-viscosity oil, a new filler cap and a new filter. The 8th VIN digit settles whether this applies at all - an 'L' truck is in scope, a 'D' 5.3L and a 'T' diesel are not. This is the costliest item on the page, so on an 'L' truck confirm by VIN that it was inspected or the engine replaced before any money moves.
24V-797
Diesel Transmission Control Valve - rear wheels lock
2021 Tahoe with the 3.0L LM2 Duramax only: the transmission control valve can fail and lock the rear wheels. Dealer installs new transmission control module software, and GM covers the transmission repair where that software finds a defective valve. Note what the two costly campaigns do to the engine choice: 'L' puts a truck in 25V-274, 'T' puts it in this one, and the 'D' 5.3L - the DFM lifter engine this checklist warns about hardest - is in neither.
25V-619
Incorrect Diesel Fuel Tank Fitted at a Prior Repair
2021 Tahoe with the 3.0L diesel: an earlier fuel-tank replacement may have fitted the wrong tank, which can leak in a rollover. Twelve vehicles across the whole GM campaign, so a long shot by volume - but it is a service-history defect rather than a build defect, so the diesel Tahoe to check is the one that has had tank work done. The campaign record lists the 2021 Tahoe and the 2021 Escalade and not the 2021 Yukon, so a sibling truck's clean record says nothing here. Dealer inspects for the correct tank and replaces it; owner letters went out 2025-11-05.
21V-064
Fuel Tank Missing Adhesive - fuel leak
Fuel tank assemblies may be missing the adhesive between the two layers of the tank shell, which can let fuel leak - a fire risk near an ignition source. Dealer replaces the tank; the recall opened 2021-03-06. Eighteen vehicles campaign-wide, and the campaign record lists the 2021 Tahoe and the 2021 Yukon and no other GM line - not the Yukon XL or the Suburban built alongside them.
21V-739
Fuel Pump Power Control Module - engine stalls
The fuel pump power control module can make the pump fail or run intermittently, interrupting fuel flow and stalling the engine. Dealer replaces the module. An intermittent stall with no stored fuel-pressure fault is the symptom pattern to ask the seller about.
22V-036
Rear Driveshaft Not Properly Heat-Treated
Rear driveshaft assemblies may contain internal parts that were not heat-treated correctly and can fail, causing a sudden loss of drive power. Dealer replaces the left and/or right rear driveshaft assembly.
21V-455
Power Steering Assist Can Cut Out - software
A power-steering control module software fault can cut steering assist at startup or while driving, leaving heavy steering at low speed. 26,847 vehicles across the 2021 GM full-size SUVs. The remedy can arrive over the air as well as at a dealer, and that matters to a used buyer: an over-the-air fix leaves no service-record entry, so a clean dealer history neither proves nor disproves this one. The VIN lookup is the only record that answers it.
21V-579
Brake Module Miscalibrated at a Dealer Service Visit
Two vehicles. A dealer technician may have calibrated the brake system control module incorrectly, which can degrade stability control, traction control, ABS and braking while towing. Dealer recalibrates the module; letters went out 2021-08-27. The campaign record lists only the 2021 Tahoe and the 2021 Yukon, and like 25V-619 this is a defect introduced by service work rather than on the line. The pattern worth carrying away: a truck with more repair history has more exposure to this class of recall, not less.
20V-735
Front Seat Attachment Bolts May Be Loose or Missing
During assembly one or both front seats were removed for a repair and the attachment bolts may not have been reinstalled correctly, so an occupied seat can move in a crash. Dealer inspects both front seat attachments and installs bolts as needed. 94 vehicles across the 2021 Tahoe, Suburban, Yukon and Yukon XL - another defect created by rework rather than by the original build.
20V-792
Front-Row Center Seat Belt Brackets Not Secured
624,216 vehicles, the largest campaign on this page: the front-row center seat-belt brackets may not be secured to the seat frame, so a center occupant may not be restrained in a crash. Dealer inspects the left and right bracket attachments and reassembles them correctly; the recall opened 2021-01-26. The defect is specific to the front-row center seating position, so it is the trucks ordered with the front bench rather than front buckets that have a position to check.
20V-811
Incorrect Seat Belt Bolts Used
Incorrect bolts may have been used at one or more seat-belt fastening locations, so a belt may not be properly attached and may not restrain an occupant. Dealer replaces the suspect bolts; the recall opened 2021-01-29. 470 vehicles spread across 18 different 2021 GM model lines - the signature of a fastener-supply mix-up rather than a design fault, which makes it unpredictable by model and answerable only by VIN.
21V-190
Third-Row Outboard Seat Belts Pinched or Misrouted
Third-row outboard seat belts may be pinched or routed behind the seat-folding mechanism, which damages the webbing until it can break in a crash. Dealer inspects, replaces damaged belts and reroutes them. Partly checkable by hand: fold and unfold the third row and watch where the belt runs.
22V-617
Third-Row Buckle Rivet Improperly Formed
The rivet holding a third-row buckle to its bracket may be improperly formed, so the buckle may not restrain an occupant. Dealer inspects the rivet heads on both sides and replaces buckle assemblies as needed. Second of two separate third-row belt campaigns on this truck - a seller saying the seat-belt recall was done has to say which one.
21V-210
Second-Row Center Belt Latch Trapped Under the Trim
Five vehicles, 2021 Tahoe only - no other GM line appears in the campaign record. The second-row center seat-belt latch can be trapped under the trim bezel where a passenger cannot reach it, which fails FMVSS 208. Dealer removes the bezel, repositions the latch plate and reinstalls it; the recall opened 2021-04-14. Five trucks out of a model year is as narrow as a campaign gets, and it is listed so the one buyer looking at one of them can find out - not because it is likely.
21V-421
Airbag Warning Lamp May Not Alert the Driver
The communications gateway module mishandles a loss of communication with the sensing diagnostic module, so the airbag warning light can illuminate inconsistently. The defect is the warning, not the airbag: a lamp that stays dark can hide a real airbag fault. Dealer or over-the-air software update - so here too, no dealer record does not mean not done.
22V-827
Daytime Running Lights Stay Lit With Headlights
338,735 vehicles across six GM full-size lines: body-control-module software can leave the daytime running lights on with the headlights, glaring oncoming traffic - an FMVSS 108 failure. Over-the-air body-control-module update; owner letters went out 2022-12-15. The campaign record lists the 2021 Escalade, Escalade ESV, Suburban, Tahoe, Yukon and Yukon XL and nothing else.