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Zane Merva Executive Editor, GM-Trucks.com 4/23/2018 Horsepower and torque ratings for the 2019 T1XX platform were published to GM's Fleet Order Guide Website over the weekend. However, as quickly as they were posted, on Monday morning they were gone. The FastLaneTruck jumped on the model order guide update early Sunday morning. GM-Trucks.com then confirmed the figures were indeed listed in the guide on Sunday but before we could write this story today the numbers had been erased. The order guide *had* listed the 2019 engines power output ratings like this: 2019 5.3L - 355hp @ 5,600rpm & 383 lb-ft of torque at 4,100rpm 2019 6.2L - 425hp @ 5,600rpm & 450 lb-ft of torque at 4,100rpm If you're aware of the current 2018 model ratings, that's a no gain rating for the 5.3L and 5hp gain and 10 lb-ft loss for the 6.2L. Could that be correct? Did GM let the cat out of the bag too early or were the wrong figures listed? Another part of this puzzle is that the 2019 5.3L will carry the RPO code of L84. That's a pretty well known Chevrolet small block designation synonymous for being the most powerful Chevy small block before the LT5 and famously produced 375-horsepower. Will we see the same for the 2019 L84 5.3L? Or will the power ratings stay the same? Either way, the engine doesn't carry the same RPO code as the 2018 model so we assume it's new in some sort of way. An exact same power rating seems unlikely but we wouldn't be surprised. And if you're wondering the 6.2L engine will wear the RPO code L87. Only time will tell.