bravada bogs down and bucks when hot

i just left chicago to move to fl and as soon as i got to some of the big hills i had problems. oh was also towing my boat with 94 bravada when this happens. going up hill woulld start to bog down whebn i let off the gas it would buck . then if got off the gas enough it would still go but i had to feather it and my speed would keep dropping.. i would pull over at rest stops and wait till it cooled down and for awihle would have no problems ... the temp gauge was reading 200 the whole time so it wasnt overheating.... the closer i got to florida the worse it got as it was warmer and wouldnt cool down as fast and seemed to happen alll the time hill or no hill ... anyone with an idea please help.0

Have you checked fuel pressure and leakdown?

:screwy:do not have access to fuel pressure gauge. should i buy one ?
could my problem be coming from my egr valve ?
can someone tell me why it says blazer problem diagnosis can i change that somehow thanks

A fuel pressure tester is an invaluable tool for all CSFI and CMFI equipped vehicles, yes, get one. Check your private messages, you'll find a link for one.

can someone tell me why it says blazer problem diagnosis can i change that somehow thanks

Because the Bravada is a Blazer with a different options pack. You'll get more exposure in the Blazer Problem Diagnosis section.

Check spark plugs!

O2 wires grounded or sensors are bad or shot catalytic converter