Cadillac Escalade 2024–2026 — technical service bulletin
Bulletin PIT6505 · NHTSA communication 11031515 · issued Apr 16, 2026
Technical service bulletin
communication type
Unknown / 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.