The GMC Envoy 4.2i - 270hp (2002 - 2010) produces 270bhp and 373Nm in standard form. A Stage 1 ECU remap can raise output to 290bhp and 395Nm, a gain of 20bhp and 22Nm, with no hardware modifications required.
Interested in a Stage 1 remap for your GMC Envoy? Get in touch and we will discuss the best options for your vehicle.
JSM Diagnostics comes to you. Mobile ECU remapping across Medway and the surrounding areas.
Call us: 07711 934 905
Mon – Fri: 8:30am – 5:30pm