Yes, Pakistan did alot for them. Military relations between the two were expanded in 1967. . The Pakistan air force has been in contact with the Royal Saudi Airforce (RSAF) since the early 1960s. Following grievances over British military cooperation in the 1960s, King Faisal turned to Pakistan's assistance for air force training and maintenance. In the 1960s, Pakistan helped the RSAF build and pilot its first jet fighters. Pakistan Air Force pilots flew RSAF Lightening in 1969 to repel South Yemani incursion on Saudi Arabia's southern border. Many Pakistanis continue to serve in the Saudi Army and as combat pilots in the Saudi Air Force.
Pakistan deployed troops in Saudi Arabia for "security duties" in the wake of the 1979 Iranian revolution.A protocol was signed between Pakistan and Saudi Arabia on 14 December 1982 following the latter's request for military manpower assistance. Throughout the 1970s and 1980s, up to 15,000 Pakistani troops were stationed in Saudi Arabia, to provide defense to the country. Some of them were part of a brigade combat force positioned near the Israeli-Jordanian-Saudi border. As of the Gulf War in 1991, up to 13,000 troops and 6,000 advisers from Pakistan were posted in Saudi Arabia.Under the 1982 protocol, cooperation was widened to include military training, defense production and sharing, and joint exercises. Contingents of the Pakistan air force have frequently participated in joint military exercises inside Saudi Arabia in conjunction with the Saudi armed forces. Pakistani military presence in the kingdom continues presently, providing Riyadh support against internal and external regional threats.
The Pakistan navy and Royal Saudi navy also share wide-ranging maritime cooperation, having conducted a series of joint naval exercises. Officers of the Royal Saudi Navy were provided training by the Pakistan Navy during the RSN's formative years.
Pakistan played decisive role al-Wadiah War and turn the table in Saudi favor. So Pakistan did alot for KSA, which are naive posters doesn't know.