I had 2 prime time units (tracer and lacrosse).
Prime time is good at screwing things thru the slide floor. Not only did this make a "POP n shimmy" on my tracer it tore up the plastic threshold and seal.
They did the same with a couple of screws on my Lacrosse slide-out. Only difference was I looked at my Lacrosse, seen the screws sticking out the bottom of the slide and backed them off.
Slide seals and wipers can make a pop sound on there own and that could be normal. Try treating your wiper seals / wipers to some 303 aerospace.
Next year is here - GO CUBS- 5 more WINS to go
2014 LaCrosse 323RST-TE-C
2009 CHEVY 2500HD Silverado Z71
2016- 86 nights of camping