Quieter on recalls than the 2016, but it inherits every expired programme and adds a tail-lamp fault of its own.

The 8-speed shudders under light, constant throttle. An owner in this year's file pins it down: "Shudder under light, constant acceleration at 35MPH to 55MPH, RPM under 1,500. Uphill grade it is accentuated. Shudder occurs for 1 second across whole vehicle, reoccurs every few seconds at a constant interval." GM's approach is a fluid flush with a revised specification, and a community teardown adds the part that costs money: "flushing the old transmission fluid and replacing it with Mobil One synthetic fluid sometimes solves the issue, but if the wait is too long to do this complete transmission flush the torque converter is prone to get glazed up and needs to be replaced." In other words the cheap fix has an expiry date, and a truck that has shuddered for years has probably passed it. Drive one at a steady 40 mph on a light throttle and feel for it.

AFM — Active Fuel Management — shuts down four cylinders under light load using collapsible lifters, and those lifters stick or collapse. A failed lifter chews the camshaft lobe it rides on, so the repair is lifters plus a cam. This year's Denali file includes an engine replaced at 9,980 miles after the truck "suddenly stalled" at 70 mph. There is no recall covering it on any Yukon year, and the only GM programme that ever addressed the family — an engine replacement for oversized lifter bores — applies to the 2023 build alone. Cold-start it, listen for a tick, and walk away from any stored misfire code.

Recall 19V645 covers vacuum pumps whose output decreases over time, reducing power brake assist and extending stopping distances on 2015–2018 Suburban, Tahoe and Yukon vehicles. The fix is a free reprogram of the Electronic Brake Control Module so the truck can fall back on hydraulic boost. A Denali owner in this year's file describes it from the driver's seat: the pedal "was stiff" at slow speeds and "the vehicle failed to slow down as intended," over and over, with the dealer unable to reproduce it. A mechanic teardown gives the cheap check — the vacuum line from the belt-driven pump to the booster leaks at its O-ring connection — and the warning that shops often replace the master cylinder instead, which is "probably not the real cause" and costs over $700.

GM's Special Coverage Adjustment N182198000 covers 5.3L and 6.2L trucks where a fuel injector delivers an improper amount of fuel, producing a check-engine light, a rough idle and possible stalling — but only in a listed set of emissions states, and the window has closed. This year's Denali file shows why it mattered: one buyer had injectors 3, 5 and 8 replaced under warranty four days after purchase, then watched injector 1 start to fail two weeks later, just past the 36,000-mile cutoff, with the parts on back order for over a week. "These issues must be common since the fuel injectors were on backorder." A community source confirms the pattern across 2015–2017 trucks. Scan for misfire codes and ask whether injectors have been replaced piecemeal.

Customer Satisfaction Program 17048 covers a very specific four-wheel-drive condition: the transfer case actuator motor brake sticks open, and if the truck is parked in 4LO on a slight slope with the system warm and the ignition switched off, "there is potential for vehicle rollback due to the range fork slipping into neutral." It sets diagnostic code C0326 58 and shows a Service AWD message. Dealers replaced the actuator assembly. This is a satisfaction programme rather than a recall, so it was never mailed with the same urgency, and it is separate from the 2026 transfer-case recall that reaches later Yukons. If the truck is four-wheel drive, ask whether it was done and whether a Service AWD message has ever appeared.

2017 is the final model year of Special Coverage 17336, which paid for a cracked air-conditioning condenser for five years or 60,000 miles on the Yukon and Yukon XL. That window is long closed. The condenser is a combined transmission-fluid and A/C cooler and it splits from thermal cycling, letting the refrigerant escape. A Denali owner describes where to look — "right along this rim, it will usually crack … you can see it moist" — and a community teardown places the crack near the mounting brackets. The cost is labour: the front bumper and front end come off, and the system needs recharging afterwards. Run the air conditioning hard, in traffic, until the fans cycle.

Denalis run Z55 AutoRide, and this year's Denali file shows both what it feels like when it fails and how long you wait. One owner reported the truck "started bouncing" with the suspension and engine lights lit and a bearing detached; another had the struts diagnosed as failed at 100,000 miles and could not have the work done "due to the parts being on backorder." A community source adds that "the front magnetic ride control shocks tend to develop leaks." Two mechanic teardowns give the sequence that costs the most: an air spring leaks, the compressor runs constantly to keep up, and the compressor burns out too. Park it overnight and check it has not settled, then start it and listen to how hard the compressor works.