On the 2021+ Chevrolet Tahoe, Autel MaxiCOM MK808S is verified for 5 jobs and Autel MaxiCheck MX900 for 5. Both are verified for epb service / reset, abs bleed, injector coding, steering angle calibration, throttle / idle relearn.
From maker coverage lists only. "Unknown" means not yet verified, not unsupported.
| Job | Autel MaxiCOM MK808S | Autel MaxiCheck MX900 |
|---|---|---|
| EPB service / reset | ✓ Supported “Parking brake calibration; Activate/Deactivate rear park brake service position” · Above GM_V19.00 | ✓ Supported “Parking brake calibration” · Above GM_V19.00 |
| ABS bleed | ✓ Supported “Automated brake bleed” · Above GM_V19.00 | ✓ Supported “Automated brake bleed” · Above GM_V19.00 |
| Injector coding | ✓ Supported “Cylinder 1–6 fuel injector flow identifier” · Above GM_V19.00 | ✓ Supported “Cylinder 1 fuel injector flow identifier; Cylinder 2 fuel injector flow identifier; Cylinder 3 fuel injector flow identifier; Cylinder 4 fuel injector flow identifier” · Above GM_V19.00 |
| FCA Secure Gateway access | ? Unknown | ? Unknown |
| TPMS relearn | ? Unknown | ? Unknown |
| Steering angle calibration | ✓ Supported “Steering wheel angle sensor learn; Steering wheel angle sensor centering” · Above GM_V19.00 | ✓ Supported “Steering wheel angle sensor centering; Steering wheel angle sensor offset calibration; Steering wheel angle sensor learn” · Above GM_V19.00 |
| Battery registration (BMS) | ? Unknown | ? Unknown |
| Throttle / idle relearn | ✓ Supported “Throttle body idle air flow compensation reset” · Above GM_V19.00 | ✓ Supported “Throttle body idle air flow compensation reset” · Above GM_V19.00 |
At cited prices, Autel MaxiCOM MK808S costs $80 less (Autel MaxiCOM MK808S: $479, Autel MaxiCheck MX900: $559, checked 2026-10-16). Across every vehicle we track, Autel MaxiCOM MK808S has 183 verified results on 43 vehicles and Autel MaxiCheck MX900 has 182 on 43. Partial entries on this vehicle: Autel MaxiCOM MK808S 0, Autel MaxiCheck MX900 0.
Autel MaxiCOM MK808S full coverage · Autel MaxiCheck MX900 full coverage · All tools for the 2021+ Chevrolet Tahoe
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