K53 ✓ Factory-verified

Cadillac · Regular Production Option

Fuel sender assembly, robust fuel system

Years 1999–00, 2002, 2025–26 Models 4 Factory citations 6

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Also described as Fuel system, robust, fuel sensorPerformance Air Intake System

Also documented for ChevroletGMCHummerOldsmobile

Documented applications

Escalade EXT — GMT800 (2002–2006) →

• 2002 ✓ Factory-verified
  ⛭ GM factory document — 2002 cadillac escalade ext rpo code list, p.1.

Escalade — GMT400-based, GMT435 (1999–2000) →

• 1999–2000 ✓ Factory-verified
  ⛭ GM factory document — 1999 cadillac escalade rpo code list, p.1.

  ⛭ GM factory document — 2000 cadillac escalade rpo code list, p.1.

Escalade — GMT800 (2002–2006) →

• 2002 ✓ Factory-verified
  ⛭ GM factory document — 2002 cadillac escalade 2wd rpo code list, p.1.

Escalade — T1XX, 5th gen (2021–2027) →

• 2025–2026 ✓ Factory-verified

  2026: base Escalade, Luxury, Sport, Platinum Luxury, Platinum Sport: O

  ⛭ GM factory document — 2025 cadillac new escalade escalade v fleet order guide, p.36.

  ⛭ GM factory document — 2026 cadillac escalade escalade v fleet order guide, p.37.

Related codes · mentioned in these notes

O

This page aggregates every documented appearance of K53 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.