Cadillac Escalade 2024–2026 — technical service bulletin
Bulletin PIT6505 · NHTSA communication 11031515 · issued Apr 16, 2026
Technical service bulletin
communication type
Unknown OR Other
component
2024–2026
model years
18
vehicle entries
Official summary
This preliminary information communicates an issue with an SES MIL DTC P2B87 and/or P2B86 cause by the Aux heater coolant pump have an unwanted oring stuck in the pump. Dealers are to remove oring and reinstall pump.
Vehicles covered
- 2024 Cadillac Escalade
- 2025 Cadillac Escalade
- 2026 Cadillac Escalade
- 2024 Cadillac Escalade Esv
- 2025 Cadillac Escalade Esv
- 2026 Cadillac Escalade Esv
- 2024 Chevrolet Suburban
- 2025 Chevrolet Suburban 1500
- 2026 Chevrolet Suburban 1500
- 2024 Chevrolet Tahoe
- 2025 Chevrolet Tahoe
- 2026 Chevrolet Tahoe
- 2024 GMC Yukon
- 2025 GMC Yukon
- 2026 GMC Yukon
- 2024 GMC Yukon XL
- 2025 GMC Yukon XL
- 2026 GMC Yukon XL
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.