Order guide still shows no max tow for the 3.0L
NHT Max Trailering Package, includes 9.76" rear axle, (GU6) 3.42 axle ratio, enhanced cooling radiator, revised shock tuning for increased control, heavier duty rear springs, increased RGAWR and (KW5) 220-amp alternator
On SLE and Elevation - Requires (L84) 5.3L EcoTec3 V8 engine, (Z82) Trailering Package, (G80) locking differential and 18" or 20" wheels and tires. Includes (JL1) trailer brake controller. Not available with 22" LPO wheels or (X31) X31 Off-Road Package.
On SLT - Requires (L84) 5.3L EcoTec3 V8 engine or (L87) 6.2L EcoTec3 V8 engine and 18" or 20" wheels and tires. Not available with 22" LPO wheels, or (X31) X31 Off-Road Package.
NHT not available on other trims
But as mentioned, tow mirrors are now available without the NHT package.