The amount in 2014 was also small. The M1 upgrades in last year's budget were
$368 million, up from $237 million in FY15. FY17's total is
$652 million.
Lima's also occupied in tearing down and rebuilding 222 M1A1 SA Abrams for Morocco; 72 of them are getting conventional rebuilds, and the other 150 a complete overhaul that makes them "zero hour, zero mile" vehicles. The first 22 were delivered last July; I'm not certain whether these are additional Abrams, or if they're rebuilding the ones provided in 2011. They're also providing more Abrams to Saudi Arabia, including replacements for the 20 lost in Yemen.
Some time in the next year or so, the Abrams (along with the Bradley and Stryker) are supposed to start testing various active protection systems, both soft-kill and hard-kill.
While I don't think new hulls have been used in Lima since the mid-90s, the Helwan plant near Cairo is still producing tanks.