well i'd love to go dyno my 3100 even though the results would probably be hilariously low 160hp crank when new, factor in 15 years of age, 156k miles and the tranny's power loss i'll be lucky if there is 100hp at the wheels My horizon does 0-60 in about the same time as the monte and it is only has 99hp

 

Ouch. Yikes!

 

worst of all, i think according to the door stickers the gvwr is rather identical

Edit: ok not quite, horizon is 3332 and monte is 4280 I didn't think the monte was that heavy, always thought it was right around 3300 pounds too