Should we assume nobody told GM that mixing electricity with water is a bad idea? We’re kidding, but the National Highway Traffic Safety Administration isn’t. It just issues a Technical Service Bulletin about water getting into parts of the GMC Hummer EV it shouldn’t be. It says that leakage around the windshield of Hummers is causing terminals of certain connections to corrode. The NHTSA calls out two areas where Hummer windshield seals aren’t sealing.

What GMC Hummer functions are affected?

bad news for gmc hummer ev owners wanting to go off-road

GMC Hummer EV in the Desert | GMC

Leaks are being found around the driver’s side A-pillar and the lower center of the windshield. The water then travels down the door jam to the connector for the door. If corroded, it affects the operation of the driver’s side window, mirrors, and door locks. Essentially, all of the powered functions that are in the door.

Either the seal is failing, or it is improperly made. This is based on close-up images supplied by the NHTSA. If there is leakage, the service bulletin says to replace the connector in the door and reseal the leaking area. Then test for leaks to make sure the seal is working.

Have there been other GMC Hummer issues?

bad news for gmc hummer ev owners wanting to go off-road

GMC Hummer EV | GMC

These types of things do happen. But in recent years it almost seems like buyers become Beta testers for early models. There have been two recalls of the 2022 GMC Hummer since production began earlier this year. For a vehicle costing over $100,000, it isn’t a good situation or good optics.

GM is leaning in hard to be the EV leader. But it has had problems with most of its all-electric models like the Chevrolet Bolt. It was hoped that with the Hummer riding on GM’s Optium electric platform, there had been enough time in development to ward off these types of quality issues.

What about recalls?

bad news for gmc hummer ev owners wanting to go off-road

GMC Hummer EV Edition 1 Commemorative Plaque | GMC

The first Hummer recall was a minor one. Especially since it only affected 10 of the SUV. It was a software issue that caused parking or running lights to either go dark or stay permanently lit. Because the single light operates so many functions, it could cause issues with multiple lights. These include lights for the brakes, turn signals, reversing, the side marker light, and the clearance light.

The next recall earlier this month affected 424 Hummers. GMC is not producing a lot of these trucks, so even though the number of affected units seems low, it represents most of the production of the EV thus far. Because this issue didn’t involve safety, as the previous one did, this was a voluntary, not mandatory, recall.

This was also for water leaks, with the issue being water getting into a high-voltage battery connector. If that happens, it corrodes the battery connector. The sealant applied to the connectors should solve the problem. Because this was a voluntary recall campaign, it doesn’t always show up in recall lists. However, plugging your Hummer VIN into the GMC Recall Center website will verify if your SUV is part of this issue or not.

MOTOR'S NEWS RELATED

Join Road & Track and Car and Driver on Our Annual Car of the Year Tests

Check out today's coolest new cars alongside editors at Performance Car of the Year, Lightning Lap, and 10Best Awards.

View more: Join Road & Track and Car and Driver on Our Annual Car of the Year Tests

Satisfying Subaru SUVs That People Love Driving and Owning

Satisfying Subaru SUVs that people love driving include the 2022 Crosstrek The 2022 Forester is another Satisfying Subaru SUV that people love Don’t overlook the 2022 Outback for a stress-free driving experience Subaru makes a reliable and safe sport utility vehicle, but that’s not all. These Satisfying Subaru SUVs ...

View more: Satisfying Subaru SUVs That People Love Driving and Owning

Holiday Rambler Eclipse RV Debuts With Theater Seats, Drop-Down Loft

It’s available with three different floor plans.

View more: Holiday Rambler Eclipse RV Debuts With Theater Seats, Drop-Down Loft

Genesis prices 2023 G80 electric car at $81,000, expands EVs to more states

Genesis on Thursday expanded the breadth and availability of its electric car lineup on its path to becoming a fully electric automaker by 2030. The luxury brand’s newest car, the 2023 Electrified Genesis G80, will cost $80,920 (including a $1,095 destination fee) when it goes on sale in September. The ...

View more: Genesis prices 2023 G80 electric car at $81,000, expands EVs to more states

This C5 Corvette Turned Off-Roader Could be Yours For Small Bucks

Photo: Caleb Hodshire/Facebook Fans of the Chevrolet Corvette and off-road vehicles now have a golden opportunity to combine their two passions for a small amount of money. A tuning enthusiast in Illinois, who specializes in Corvette conversions, is selling on Marketplace a fifth-generation (C5) 1999 Corvette built to venture ...

View more: This C5 Corvette Turned Off-Roader Could be Yours For Small Bucks

Audi heads to F1, 2025 Cadillac Celestiq, 2023 Electrified Genesis G80: Today's Car News

Audi confirmed it will enter F1 for the 2026 season. The automaker will team with a thus far unknown chassis partner to provide power units that will be built in Germany and run on synthetic fuel. Alfa Rome announced it will split with Sauber, and all points sign to Audi ...

View more: Audi heads to F1, 2025 Cadillac Celestiq, 2023 Electrified Genesis G80: Today's Car News

Genesis expands GV60, an electric SUV, availability to four more US states

Where is the Genesis GV60 available to buy Electrek’s Take Now might be your chance if you’ve been waiting to buy the Genesis GV60 EV SUV. The Korean luxury automaker announced Tuesday that its flagship electric SUV, the GV60, will be available in four more US states starting in ...

View more: Genesis expands GV60, an electric SUV, availability to four more US states

Our Long-Term 2022 Cadillac CT5-V Blackwing Is off to an Unforgettable Start

With our 668-hp, six-speed-manual sports sedan, the highs are high, and the lows are low.

View more: Our Long-Term 2022 Cadillac CT5-V Blackwing Is off to an Unforgettable Start

Dodge goes electric in style | Autoblog Podcast #744

Tested: Best Car Vacuums for 2022

China: Power to the people or to the carmakers?

Tesla premium connectivity through Starlink V2 confirmed

2022 Ford F-150 Lightning strapped to dyno despite challenges

1983 DeLorean DMC-12 with 5,397 miles for sale

Numbers of Koenigsegg CC850s increase to 70 due to high demand

Tech Deep Dive: What Makes the New Porsche GT3 RS the Most Extreme 911 Ever

4 Terrible 2022 Subcompact SUVs That Consumer Reports Predicts Owners Will Hate

Xiaomi in talks with BAIC to produce electric cars, says Bloomberg

Audi Has Decided to Enter Formula 1 in 2026 After Much Speculation

North Dakota Swing Ahead For WoO: What To Watch For

OTHER MOTO NEWS