Reliability
GM Is Chasing a Rear Suspension Creak on the Cadillac Escalade IQ and IQL
A new GM bulletin traces a squeak over bumps and in turns to the rear upper control arm bushings. A fix is still in development, so dealers are told not to replace parts yet.
General Motors has told dealers it is investigating a squeak or creak from the rear suspension of the electric Cadillac Escalade IQ and its longer sibling, the Escalade IQL. A preliminary service bulletin created on October 15, 2026, and filed with the National Highway Traffic Safety Administration four days later, traces the noise to the bushings in the rear upper control arms. There is no repair yet. For now, GM wants technicians to confirm where the sound comes from and leave the parts in place until engineering releases a fix.
What the bulletin covers
The document, PIT6558, applies to all 2025 and 2026 Escalade IQ and all 2026 Escalade IQL vehicles in North America. It also lists the 2024-2026 Chevrolet Silverado EV and GMC Sierra EV, the electric pickups that share the big Cadillac's Ultium truck underpinnings. Owners typically hear the sound from the back of the vehicle when driving over bumps or while turning.
Bushings are the rubber sleeves that let a suspension arm pivot while absorbing vibration. When one starts to bind, it can creak in a way that seems to wander around the cabin, and GM admits the noise can be hard to pin down. The bulletin suggests technicians use clip-on chassis microphones or a PicoScope signal analyzer near the upper control arm bushing, and it includes a recording of the sound for comparison.
If the bushings turn out to be the source, the eventual remedy is a new upper control arm. GM is explicit that no parts should be replaced at this stage. Engineering is working on an update, and the preliminary notice will be revised or replaced by a full technical service bulletin once a correction is ready. Until then, GM's advice is to keep driving the vehicle.
Why it stands out on this SUV
Ride quality is central to the Escalade IQ's appeal. Cadillac fits it with independent front and rear suspension, Magnetic Ride Control 4.0, an adaptive air suspension that can lower the body by up to 2 inches or raise it by 1 inch, and standard four-wheel steering, all on 24-inch wheels. Both the IQ and the IQL are built at GM's Factory ZERO plant in Detroit. A recurring creak from the rear is exactly the sort of flaw that gets noticed in Cadillac's flagship electric SUV.
The bulletin does not include 2027 models or the gas-powered Escalade, and it is not a safety recall. GM has not said how many vehicles have the problem.
Owner brief
What it means for owners
- Who is affected: owners of a 2025 or 2026 Escalade IQ or a 2026 Escalade IQL who hear a squeak or creak from the rear over bumps or in turns.
- What to do now: book a service visit and describe when the noise happens, including speed, outside temperature, road surface and turning direction. A short phone video with sound helps. Mention bulletin PIT6558 so the technician can compare against GM's recording.
- What the dealer will do: confirm and document the source, but under GM's instructions it should not replace parts yet. Ask for a repair order that records the complaint. That paper trail matters when the permanent fix arrives.
- Cost: on a vehicle this new, a suspension noise repair should fall under Cadillac's four-year/50,000-mile bumper-to-bumper warranty. If you bought used, check the original in-service date.
- Different symptoms: a clunk, a pull to one side, uneven tire wear, a sagging corner or a suspension warning message points to something other than this bulletin and should be inspected promptly.
- Recalls: this is not a recall, but run your VIN at nhtsa.gov/recalls anyway. Certain 2026 Escalade IQ and IQL models are part of a separate battery recall, campaign 26V494.
Dashbird tipIf your Escalade IQ starts creaking, add the date and odometer reading to the service history in Dashbird, so its PDF report shows when the complaint began and when the fix was made.
