Owners report three distinct body and structural issues on the 2011 Enclave.
Power liftgate collapse dominates the complaints. Struts fail without warning, causing the gate to slam shut on heads, backs, and hands. Failures occurred between 25,000 and 112,000 miles. Even after repair under recall 15V415000, some gates failed again at higher mileage. The root issue affects 686,287 Lambda platform vehicles. A critical problem: GM could not supply replacement parts for extended periods—one owner reported a five-month wait with no end in sight, leaving the vehicle unusable for daily cargo access and preventing resale.
Rear-window wind buffeting creates severe turbulence and loud noise (94+ dB at highway speeds, reaching beyond 120 dB). Lowering the rear window causes the entire vehicle to shake violently, posing a distraction and potential hearing hazard to children. Dealers acknowledged the issue as "wind abatement" but offered only a workaround: crack a front window slightly before opening the rear.
Sharp door-panel edges on the front doors protrude past the body, cutting occupants' legs. At least three people sustained lacerations; one owner had to manually sand the edges smooth.
All three issues presented genuine safety and usability hazards.
Failure modes owners describe
Power liftgate strut failure causing sudden collapse or loss of hold
Liftgate struts fail, causing the gate to drop closed unexpectedly, strike occupants, or fail to stay open when propped. The failure allows the gate to fall under its own weight without support. In some cases the gate refuses to operate at all.
When: 25,000–112,000 miles; original failures appearing as early as 25k and recurrence at higher mileage even after recall repair
Symptoms owners cite: Liftgate drops or closes suddenly without warning; Liftgate will not stay open when propped; Liftgate strikes occupants on head or back; Liftgate locks fail mid-operation; Liftgate jumps up and down when open; Loss of power liftgate function entirely
Repairs/costs cited: Liftgate strut assembly replacement under recall 15V415000; parts were unavailable for months (5+ months reported in one case). One complaint mentions liftgate switch and rubber seal replacement after water/dust intrusion.
Recalls/TSBs owners mention: NHTSA Recall Campaign 15V415000 issued; affects 686,287 Lambda platform vehicles (2008–2012 Buick Enclave, 2009–2012 Chevrolet Traverse, 2007–2012 GMC Acadia, 2007–2010 Saturn Outlook). Parts shortages prevented timely repairs. One dealer advised against repair denial.
Wind buffeting and resonance when rear window is lowered
Lowering the rear window while driving creates severe wind buffeting, loud noise, and whole-vehicle vibration and shaking. The issue is called wind abatement by Buick and worsens with speed.
When: Occurs during operation at highway speeds (45–60+ mph)
Symptoms owners cite: Loud wind noise (94 dB at 45 mph, exceeding 120 dB at higher speeds); Violent shaking and vibration throughout vehicle; Disorienting to driver and passengers; Risk of hearing loss to occupants including children
Repairs/costs cited: Dealer recommended cracking front window ~1 inch before opening rear window as a workaround; no factory repair offered.
Recalls/TSBs owners mention: Buick acknowledged the issue as wind abatement but did not offer a fix; dealers advised workaround only.
Sharp plastic door-panel edge creating laceration hazard
Front driver and passenger door panels have exposed sharp plastic edges that protrude past the metal door body, causing deep lacerations to legs and body of occupants entering or exiting the vehicle.
When: Present at or shortly after purchase
Symptoms owners cite: Sharp plastic edge on door panel; Deep cuts and lacerations to legs of occupants; Injury to at least three people
Repairs/costs cited: Owner manually trimmed and sanded the sharp corners to resolve the hazard; no factory remedy confirmed.
Synthesized from 19 NHTSA owner complaints — unverified consumer
allegations, summarized for patterns. The verbatim filings appear below.